{"title":"All Products","description":"","products":[{"product_id":"keratherm-transistor-insulators","title":"Keratherm Transistor Insulators","description":"\u003cp\u003e\u003cstrong\u003eProblem\u003c\/strong\u003e: You need an easy to use, non-electrically-conducive material between your transistors and heatsinks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSolution\u003c\/strong\u003e: Keratherm. \u003c\/p\u003e\n\u003cp\u003eKerafol Keratherm 86\/82 is regarded as the best in the business. \u003c\/p\u003e\n\u003cp\u003eThe material is silicone and fiberglass impregnated with ceramic. In normal use it can match or even exceed the performance of mica and grease.\u003c\/p\u003e\n\u003cp\u003eDimensions are 32mm x 23mm, which will fit TO-247, TO-3P, and TO-218. Users can it to fit TO-220 and smaller packages.  One side is smoother than the other, and have consulted at length with manufacturer. They advised us that \u003cem\u003eeither side\u003c\/em\u003e can be used in contact with the heatsink or transistor.\u003c\/p\u003e\n\u003cp\u003eWe guarantee this is 100% original Keratherm Red sourced from the original manufacturer, Kerafol.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUsage notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePeel the pink \"sliver\" of Keratherm away from the backing.\u003c\/li\u003e\n\u003cli\u003eThe Keratherm is delicate \"pink\" colored material\u003c\/li\u003e\n\u003cli\u003eDo not use thermal grease.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBe careful to not tear or puncture the Keratherm during installation. Ensure that all all swarf and debris are cleaned from heatsinks and devices.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eModel: \u003cspan\u003e86\/82\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFormat: \u003c\/span\u003eXXXX-028 (To suit \u003cspan\u003eTO-247, TO-3P and \u003cspan\u003eTO-218)\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cspan\u003eColor: Red (Pink). Color varies slightly from batch to batch,\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/kerafol_keratherm_red.pdf\"\u003eDatasheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/media\/pdf\/keratherm-dimensions.pdf\"\u003eDimensions\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kerafol","offers":[{"title":"Default Title","offer_id":5938673860,"sku":"DIYK-KERATHERM-6","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/keratherm.png?v=1708499109"},{"product_id":"amp-camp-amp-pcb","title":"Amp Camp Amp PCB","description":"\u003cdiv\u003eThese are the current revision of the Amp Camp Amp PCB. The ACA V1.8 kit uses these PCBs.\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003eThese are available with either:\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eTinned copper traces\u003c\/li\u003e\n\u003cli\u003eGold plated copper traces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003eThe official ACA kits have used either over the years, and experts would tell you the trace material makes no difference at all to the sound. Choose what feels right to you.\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e88mm x 57mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e\n\u003ca href=\"\/pages\/universal-mounting-specification-v3\"\u003eUMS Heatsink\u003c\/a\u003e Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e1.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Color\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eGreen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eTracks\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e35um copper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"diyAudio Store","offers":[{"title":"Tin traces","offer_id":16373247213602,"sku":"DIYP-ACA-216","price":10.0,"currency_code":"USD","in_stock":false},{"title":"Gold traces","offer_id":5938996356,"sku":"DIYP-ACAG-216","price":15.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/IMG_3551.png?v=1715643423"},{"product_id":"mezmerize-b1-buffer","title":"Mezmerize B1 Buffer","description":"\u003cp\u003eThe \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/pass-labs\/145201-building-symmetrical-psu-b1-buffer.html#post1854512\"\u003eMezmerize\u003c\/a\u003e is a direct coupled preamp (no coupling caps) based on Nelson Pass's B1 Buffer. It boasts symmetrical Salas shunt voltage regulators that use LED strings for very accurate voltage reference.  The PCB has provisions for up to 6 relays for input signal switching and an output relay for delayed start-up muting.\u003cbr\u003e\u003cbr\u003eThese boards are intended for adventurous \/ advanced DIYers willing to dedicate their own time to research what's needed to complete their project.  There is no complete project kit, no parts kits, and no build guide.  It's an amazing project for those looking for something different.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ePlease visit the \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/213998-mezmerize-b1-buffer-preamp.html\"\u003eMezmerize Helpdesk Thread\u003c\/a\u003e for questions.\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eNotes on the re-issue, Bill of Materials and Schematic\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Mez_TYA_018_BOM_Notes_Rev.pdf?70\"\u003eMezmerize \"10 Years After\" BOM and Notes UPDATED 2019-08-02 (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-MEZDCB1-TYA018-schematic.png?7827064480356606732\"\u003eMezmerize \"10 Years After\" Schematic (PNG)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.diyaudio.com\/forums\/the-diyaudio-store\/213998-mezmerize-b1-buffer-preamp-post6719556.html\"\u003eNick's comment on JFET IDSS \u003c\/a\u003echoice\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable class=\"data-table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cbr\u003e\n\u003c\/div\u003e\n\u003cspan\u003e200.49 x 68.58 mm\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eHoles on 10mm x 10mm grid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eNumber of boards included\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5939090628,"sku":"DIYP-MEZB1-12C","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_0512.png?v=1450479399"},{"product_id":"burning-amplifier-gain-stage-for-ba-1-ba-2","title":"Burning Amplifier Local Feedback Gain Stage","description":"\u003cp\u003eBurning Amplifier Gain Stage Board (BAGS) which handles voltage gain for two channels when you populate it with your components. This board is required for both the single-ended \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/showthread.php?t=154777\"\u003eBA-1\u003c\/a\u003e amp and the complementary \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/showthread.php?t=150438\"\u003eBA-2\u003c\/a\u003e amp. \u003c\/p\u003e\n\u003cp\u003eBAGS is the Burning Amplifier Gain Stage board. Being the Front-End, this is where all the signal voltage gain of a Burning Amp comes from. It's main purpose is to provide adequate gain to drive the succeeding output stage of a Burning Amp assembly.\u003c\/p\u003e\n\u003cp\u003eFor use as a Burning Amp, it requires bias boards and output stage.  However it can also be used standalone as a pre-amplifier.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlease visit the \u003c\/span\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/214012-burning-amplifiers.html\"\u003eBurning Amplifier Helpdesk Thread\u003c\/a\u003e\u003cspan\u003e for any questions you might have and for a definitive list of links to all articles and discussions about the Burning Amps.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\n\u003cbr\u003eADDITIONAL INFORMATION\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAGS-1V20-bom.xls\" target=\"_blank\"\u003eBill of Materials\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAGS-1V20-schematic.pdf\" target=\"_blank\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAGS-1V20-dimensions.pdf\" target=\"_blank\"\u003eMounting Diagram\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5939242628,"sku":"DIYP-BAGS-120","price":9.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/p-bags-1v20_copy3.png?v=1448531939"},{"product_id":"burning-amplifier-gain-stage-for-ba-3","title":"Burning Amplifier Zero Feedback Gain Stage","description":"\u003cp\u003eBurning Amplifier 3 Gain Stage Board (BAGS-N). One board works for 2 channels.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0in;\"\u003e\u003cspan style=\"font-family: Arial,sans-serif;\"\u003eThe \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/showthread.php?t=194809\"\u003eBA-3\u003c\/a\u003e gain stage is the latest feedback-less \"front end\" for the Burning Amp series of Class A Mosfet follower output stages.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0in;\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener noreferrer\" href=\"http:\/\/www.diyaudio.com\/forums\/pass-labs\/258301-ba-3-amplifier-illustrated-build-guide.html\" target=\"_blank\"\u003eIllustrated Build guide for the BA-3\u003c\/a\u003e \u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Arial, sans-serif; line-height: 1.4;\"\u003eThe BA-3 gain stage can also be used as a preamplifier. \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/sites.google.com\/site\/audiosocietyofminnesota\/Home\/diy-projects\/pass-ba-3-preamplifier\" target=\"_blank\"\u003eSee an interesting preamplifier build using the BA-3\u003c\/a\u003e.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-family: Arial, sans-serif; line-height: 1.4;\"\u003eAnother example and build guide using the BA-3 gain stage as a line stage preamp:  \u003c\/span\u003e\u003ca rel=\"noopener noreferrer\" style=\"font-family: Arial, sans-serif; line-height: 1.4;\" href=\"http:\/\/www.diyaudio.com\/forums\/pass-labs\/258022-ba-3-preamp-build-guide.html#post3968063\" target=\"_blank\"\u003eBA-3 preamp build guide\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eRequires bias boards and output stage to be used as part of a Burning Amp\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-bottom: 0in;\"\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003ePlease visit the \u003c\/span\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/214012-burning-amplifiers.html\" style=\"font-family: Arial, sans-serif;\"\u003eBurning Amplifier Helpdesk Thread\u003c\/a\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003e for any questions you might have and for a definitive list of links to all articles and discussions about the Burning Amps.\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"margin-bottom: 0in;\"\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003eAdditional Information\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAGSN-1V20-bom-V1.0B.xls\" target=\"_blank\"\u003e\u003cspan face=\"Arial, sans-serif\"\u003eBill of Materials (Updated 2018-03-31)\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAGSN-1V20-schematic.pdf\" target=\"_blank\"\u003e\u003cspan face=\"Arial, sans-serif\"\u003eSchematic\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAGSN-1V20-dimensions.pdf\" target=\"_blank\"\u003e\u003cspan face=\"Arial, sans-serif\"\u003eMounting Diagram\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan face=\"Arial, sans-serif\"\u003e\u003ca rel=\"noopener noreferrer\" href=\"http:\/\/www.diyaudio.com\/forums\/pass-labs\/258301-ba-3-amplifier-illustrated-build-guide.html\" target=\"_blank\"\u003eBuild Guide\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e140mm x 70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5939903556,"sku":"DIYP-BAGSN-120","price":14.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/BA-3.jpg?v=1455100906"},{"product_id":"universal-psu","title":"Universal Power Supply","description":"\u003cp\u003eThe all new Universal PSU V3.0. Bigger and badder than ever, complete with a \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/power-supplies\/244788-diyaudio-power-supply-circuit-board-v3-illustrated-build-guide.html\"\u003ewell illustrated build guide\u003c\/a\u003e.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFully compatible and optimized for the \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/chassis-enclosure\"\u003eDeluxe Chassis\u003c\/a\u003e to allow easy installation on the base, chassis front panel, or on \u003ca href=\"\/collections\/accessories\/products\/riser-panels\"\u003eriser panels\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eCan accomodate 35mm, 30mm and 25mm caps\u003c\/li\u003e\n\u003cli\u003eDouble sided 70um copper tracks\u003c\/li\u003e\n\u003cli\u003eAdded PI resistors for a total of 7 per side of the PSU\u003c\/li\u003e\n\u003cli\u003eEach side is completely independent of the other providing separate grounding take off points\u003c\/li\u003e\n\u003cli\u003eGrounding scheme at user's discretion (i.e. can be utilized for star grounding)\u003c\/li\u003e\n\u003cli\u003eGround vias available for joining on-board\/local ground\u003c\/li\u003e\n\u003cli\u003eOn-board heatsinking for the diodes\u003c\/li\u003e\n\u003cli\u003eLarger tracks whenever possible\u003c\/li\u003e\n\u003cli\u003eMost inputs and outputs have larger vias to accommodate large wires\u003c\/li\u003e\n\u003cli\u003eInput and output vias arranged to also accommodate Snap-On terminals\u003c\/li\u003e\n\u003cli\u003eOutput has larger vias for direct wire soldering to the board\u003c\/li\u003e\n\u003cli\u003eOutput has vias arranged to either accept Euroblock connectors or Snap-On terminals\u003c\/li\u003e\n\u003cli\u003eDiode Section and Capacitor Section can be joined either by large diameter jumper wires or Fast-On connectors or direct soldering\u003c\/li\u003e\n\u003cli\u003eCapacitor section can be stacked one on top of the other. Connections for quick parallel stacking are provided via Snap-On connectors or direct soldering.\u003c\/li\u003e\n\u003cli\u003eDiode section can be snapped off from the Capacitor section (0.2mm V-Cut both sides)\u003c\/li\u003e\n\u003cli\u003eCapacitor section can be snapped off lengthwise regardless if the Diode section is still attached or snapped off for more build flexibility (0.2mm V-Cut both sides)\u003c\/li\u003e\n\u003cli\u003eSnapping is possible thanks to 0.2mm v-cuts on each side of the 1.6mm board.  It takes a lot of force to snap the board - enough so you won't ever snap it accidentally but not so much that you will have a hard time snapping it.\u003c\/li\u003e\n\u003cli\u003e80x80 mounting scheme on the Capacitor section for front panel chassis mounting\u003c\/li\u003e\n\u003cli\u003eExtensively supports DA's mounting systems and bases\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptions for Input snubbers (RC or RC + C) and options for output RC snubbers or bypass\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003eIf you have any questions please discuss them in the \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/238918-v3-universal-power-supply-circuit-board.html#post3554857\"\u003eV3 Universal Power Supply Circuit Board\u003c\/a\u003e thread.\u003c\/div\u003e\n\u003ch2\u003e\n\u003cbr\u003eAdditional Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-PSU-1V30-bom.xls?15967766640867126881\" target=\"_blank\"\u003eBill of Materials\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-PSU-1V30-schematic.pdf\" target=\"_blank\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-PSU-1V30-dimensions.png\" target=\"_blank\"\u003eDimensions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/power-supplies\/244788-diyaudio-power-supply-circuit-board-v3-illustrated-build-guide.html\" target=\"_blank\"\u003eBuild Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e171mm x 156mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eHoles are on a 10mm x 10mm grid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eNumber of boards included\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5940110404,"sku":"DIYP-PSU-130","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_0428.png?v=1448507826"},{"product_id":"soft-start-speaker-turn-on-delay-and-dc-protector-boards","title":"Soft Start \u0026 Speaker Turn-On Delay \/ DC Protector Combo","description":"\u003cp\u003eThis pack includes one Soft Start Board and one Speaker Turn-On Delay and DC protector board.  They are not available for purchase separately.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSoft Start Board\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eEvery time you switch on your monster (or not so monster) power amplifier, the initial current drawn from the mains can be many times that of full power. This is more commonly known as inrush current, caused primarily by huge power transformer switch on currents and empty capacitor banks. At power on, the filter capacitors in your power supply are completely discharged, and acts as a short circuit for a brief period of time until a certain amount of voltage has been reached. This brief period of time can be very harmful to your Power Switch, Fuse, Power Transformer, Rectifiers and Filter Capacitors. This Softstart project is employed to limit these destructive inrush currents by momentarily introducing a resistance between the power transformer’s primary winding and the mains supply, which, after a brief moment, is completely connected to the mains. This momentary delay is already enough to charge the filter caps and limit the inrush current draw.\u003c\/p\u003e\n\u003cp\u003eIf you have any questions please visit the \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/247280-power-supply-soft-start-board-v3.html\"\u003ePower Supply Soft Start V3 thread\u003c\/a\u003e in the store support forum.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/2014-01-14_Soft_Start_board_BOM_v3.pdf?v=1636321583\" target=\"_blank\"\u003eBill of Materials\u003c\/a\u003e \u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/SSSchematic.jpg\" target=\"_blank\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/247280-power-supply-soft-start-board-v3-2.html#post3832887\" target=\"_blank\"\u003eAssembly photos\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e110mm x 55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes   \u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eHoles are on a 10mm x 10mm grid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLayers\u003c\/th\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSpeaker Turn-On Delay and DC Protector Board\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eProtect your precious speakers from power amplifier turn-on and turn-off transients and amplifier faults such as DC voltage presence at the output. The Speaker Protector connects your speaker after a few seconds from powering on your amplifier, long enough for the power amp to settle down thus eliminating any nasty thumps that you hear on your speakers. It also provides speaker cut-off in the event there’s DC voltage present in your amp’s output protecting your speaker’s voice coil from burning out.\u003c\/p\u003e\n\u003cp\u003eIf you have any questions please visit the \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/247279-speaker-turn-delay-dc-protector-board-set-v3.html\"\u003eSpeaker Turn-On Delay and DC Protector V3 thread\u003c\/a\u003e in the store support forum.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Speaker_Protection_Board_BOM_V3.0.2b.xls?v=1609550316\" target=\"_blank\"\u003eBill of Materials (3.0.2b)\u003c\/a\u003e -- Note: 3-paged BOM\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Speaker_Protection_Board_Schematic.jpg\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/247279-speaker-turn-delay-dc-protector-board-set-v3.html#post3837282\" target=\"_blank\"\u003eAssembly photos\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e100mm x 50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eHoles are on a 10mm x 10mm grid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5940139268,"sku":"DIYP-SSSDP-230","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_0498.png?v=1448507547"},{"product_id":"super-regulator","title":"Super Regulator","description":"\u003cdiv\u003e\n\u003cp class=\"p1\"\u003eYou want to build a preamp, a DAC, a phono stage, anything that needs a nominal supply voltage between 3.3V and 18V or even more, positive and\/or negative polarity?\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYou want a power supply regulator that approaches an ideal DC voltage source as best as possible, bringing out the best in your equipment? Look no further – the Superreg fills your bill beautifully!\u003c\/p\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp class=\"p1\"\u003e\u003cspan color=\"#585858\"\u003eThe 86 x 77 mm (3.4 x 3 inch) board holds all parts (sourced by you) including a heatsink, for a dual supply regulator that can deliver up to 1A per side. Board can be separated in pos and neg reg board if needed for construction. Several threads on diyaudio discuss customization for a wide range of output voltages. The regulator boards accept a DC input from your favorite transformer\/rectifier\/reservoir cap.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"p1\"\u003e\u003cspan color=\"#585858\"\u003eResistor \/ Voltage Table\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"p1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Example_Super_Regulator_Calculations_for_Resistor_Values_v5.pdf?v=1619915284\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Example_Super_Regulator_Calculations_Three_Vrefs_v5_480x480.png?v=1619594432\" alt=\"Example Resistor Values\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e  \u003c\/p\u003e\n\u003ch2 class=\"p1\"\u003eDetails\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eV2.3b PCB designed by Jan Didden based on the Jung\/Didden regulator from Audio Amateur, includes Walts’ latest refinement;\u003c\/li\u003e\n\u003cli\u003eBlue PCB contains one positive and one negative regulator; can be separated for individual use, 10mm mounting pitch in both cases;\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePicture shows stuffed board - this is an example only, we are only selling the PCB and you will need to buy all the parts to stuff the board;\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.linearaudio.net\/superregs\" target=\"_blank\" rel=\"noopener\"\u003eArticle including BOM \u0026amp; Schematic by Jan Didden\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/superreg_V2.3_BOM.PNG?7926544932534767816\" target=\"_blank\" rel=\"noopener\"\u003eBOM for V2.3\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.diyaudio.com\/archive\/blogs\/comments\/comment3647.html\" target=\"_blank\" rel=\"noopener\"\u003eJan's introduction to the Super Regulator in his blog\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eMeasurements from Jack Walton's Linear Audio Vol 4 Article.\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003ePerformance graphs from this article regenerated in color. The Super Regulator is marked as \"Jung\" in these graphs:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/V4_JW_F5.pdf\" target=\"_blank\" rel=\"noopener\"\u003eFig 5, positive regulators Line Rejection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/V4_JW_F6.pdf\" target=\"_blank\" rel=\"noopener\"\u003eFig 6, negative regulators Line Rejection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/V4_JW_F7.pdf\" target=\"_blank\" rel=\"noopener\"\u003eFig 7, positive regulators Output Noise\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/V4_JW_F8.pdf\" target=\"_blank\" rel=\"noopener\"\u003eFig 8, positive regulators Output Impedance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/V4_JW_F9.pdf\" target=\"_blank\" rel=\"noopener\"\u003eFig 9, negative regulator Output Impedance\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/247281-super-regulator.html\" target=\"_blank\" rel=\"noopener\"\u003eSuper regulator board support discussion thread\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/superreg_V2.3b_fig_2.pdf\" target=\"_blank\" rel=\"noopener\"\u003eConnection diagram for 2.3b\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e2.3 Update includes:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eadded option to use SMD as well as Through-Hole footprint for the opamp\u003c\/li\u003e\n\u003cli\u003eadded an RC-filter for the remote sense to be better armed against tendencies for oscillation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eVoltage settings\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eSee this \u003ca href=\"https:\/\/www.diyaudio.com\/forums\/the-diyaudio-store\/247281-super-regulator-post6628064.html\" target=\"_blank\" rel=\"noopener\"\u003epost containing a list of resistor values for commonly used voltage settings\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eSee this \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Superreg_customizing_r2.pdf\" target=\"_blank\" rel=\"noopener\"\u003ePDF on customizing the output voltage\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e2.3b Update includes:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eUpdated legend on silkscreen\u003c\/li\u003e\n\u003cli\u003ePlease see new \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/superreg_V2.3b_fig_2.pdf\" target=\"_blank\" rel=\"noopener\"\u003efigure PDF for 2.3b\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e86mm x 77mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eHoles are on a 10mm x 10mm grid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2.3b\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":4838662799394,"sku":"DIYP-SR-123B","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_0445.png?v=1549173145"},{"product_id":"aleph-j","title":"Aleph J Circuit Boards","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5941228356,"sku":"DIYP-AJ-220","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/AJCircuitBoards.png?v=1716431455"},{"product_id":"f-5t","title":"F5 Turbo PCBs","description":"\u003cp\u003eThis set of circuit boards is used to make the F5 Turbo power amplifier from the mind of DIY hero and audio genius, Nelson Pass.\u003c\/p\u003e\n\u003cp\u003eOne set of PCBs will make a stereo F5 Turbo v2, or a single monoblock F-5T v3.  This is the third revision of the boards, which has nothing to do with using them to make a V2 or V3 F5 Turbo!\u003c\/p\u003e\n\u003cp\u003ePlease read the \u003ca href=\"https:\/\/www.firstwatt.com\/wp-content\/uploads\/2024\/01\/art_f5_turbo.pdf\"\u003eF5 Turbo Article\u003c\/a\u003e written by Mr. Pass to familiarize yourself with the different versions.\u003c\/p\u003e\n\u003ch4\u003eIllustrated build guide\u003c\/h4\u003e\n\u003cp\u003eAn Illustrated build guide showing all sorts of useful information on how to build your F5Turbo can be found here - \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/pass-labs\/254056-f5turbo-illustrated-build-guide.html\"\u003eIllustrated Build Guide\u003c\/a\u003e\u003c\/p\u003e\n\u003ch4\u003eCircuit Description\u003c\/h4\u003e\n\u003cp\u003eThe F5 Turbo is a Push-Pull, Class-A power amplifier. Esentally a scaled-up F5, with more output devices and a higher voltage power supply. The F-5 Turbo is a voltage source amplifier, requiring nothing out of the ordinary from your preamp or speakers.\u003c\/p\u003e\n\u003cp\u003eThe F5 Turbo is the biggest offering in the Nelson Pass\/Firstwatt DIY series of amplifiers. The v3 will handily drive 100Watts into 8ohm, and much more into 4ohm. This circuit also has the ability to scale up to truly amazing power levels.\u003c\/p\u003e\n\u003cp\u003ePopulate these boards with your components, then add your own power supply, chassis and heat sinks to complete the amplifier. The mounting hole spacing is compatible with the \u003ca href=\"\/pages\/universal-mounting-specification\"\u003ediyAudio Universal Mounting Specification\u003c\/a\u003e mounting pattern found in the Deluxe Chassis.\u003c\/p\u003e\n\u003ch4\u003eOutput Power\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eF5T v2 - 50 Watts per channel into 8ohm\u003c\/li\u003e\n\u003cli\u003eF5T v3 - 100 Watts into 8ohm. (The v3 should be built as monoblocks.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePower supply requirements\u003c\/h4\u003e\n\u003cp\u003eA stereo F5 Turbo v2 requires a bipolar power supply of (+\/- 32V). This will require an 24V+24V (or 48V Center Tapped) transformer from 600-800VA, and PSU capacitance of 80,000uF per rail or more. The DIYaudio \u003ca href=\"\/collections\/power-supplies-accessories\/products\/universal-psu\"\u003eUniversal PSU v3\u003c\/a\u003e was made with the requirments of this very amp when it was designed.\u003c\/p\u003e\n\u003cp\u003eThe F5 Turbo v3 will require two of the above PSU. (One for each monoblock)\u003c\/p\u003e\n\u003cp\u003eThe amplifier has the ability to use a higher voltage PSU for more power, but you must 'cascode' the driver stage of the amp to protect the input JFETs. (And have even more heatsink.) See the article for more details.\u003c\/p\u003e\n\u003ch4\u003eChassis suggestions\u003c\/h4\u003e\n\u003cp\u003eThis is a high-wattage Class-A amplifier. It has lots of excess heat that needs to be dealt with. The 5U Chassis is of suitable size and dissipation for a Stereo v2 or a mono v3.\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/diyaudiostore.com\/products\/2025-deluxe-chassis-5u\"\u003e5U Deluxe amplifier chassis\u003c\/a\u003e makes a great home for the F5 Turbo. The \u003ca href=\"\/pages\/universal-mounting-specification\"\u003ediyAudio \"Universal Mounting Specification\" (UMS)\u003c\/a\u003e is a common mounting pattern between the amplifier PCB and the heatsinks. The driver board will fit on the heatsinks, between the output boards.\u003c\/p\u003e\n\u003ch2\u003eHelpful Links\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/www.firstwatt.com\/wp-content\/uploads\/2023\/12\/art_f5_turbo.pdf\" target=\"_blank\"\u003eF5 Turbo Article by Nelson Pass\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/attachments\/pass-labs\/374352d1380703296-f5-turbo-builders-thread-f5-turbo-bom-v2.pdf\"\u003eF5T v2 Bill of Materials\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/attachments\/pass-labs\/374706d1380891005-f5-turbo-builders-thread-f5-turbo-v3-bomrev2.pdf\"\u003eF5T v3 Bill of Materials\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/233915-f-5t-boards.html\"\u003eSupport discussion thread for these boards\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003ePlease note that while these boards are marked as \"V3\" that refers to the fact they are the third revision of the boards. You can use these boards to make either a F5 Turbo v2 or v3.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOther Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003ca href=\"https:\/\/www.firstwatt.com\/wp-content\/uploads\/2024\/01\/art_f5_turbo.pdf\"\u003eF5 Turbo\u003c\/a\u003e, is an \u003ca href=\"https:\/\/diyaudiostore.com\/products\/f-5\"\u003eF5\u003c\/a\u003e on steroids, with outputs up to 100w per channel\u003c\/li\u003e\n\u003cli\u003eFor questions about the PCB itself and myriad links to the original article, discussion threads and build threads, please see the \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/233915-f-5t-boards.html\"\u003eF-5T boards support thread\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eThis is not a beginners project\u003c\/li\u003e\n\u003cli\u003eThese boards are the newest revision, having a new layout of the Front-End board featuring many new solder pads, and rationalized labeling and numbering across all the PCBs. The layout has been only slightly modified, but it is different from the v2 PCB.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e\n\u003ca href=\"\/pages\/universal-mounting-specification\"\u003eUMS Heatsink\u003c\/a\u003e Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5941365700,"sku":"DIYP-F5T-630","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_0524.png?v=1715882962"},{"product_id":"f-5","title":"F5","description":"\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e170mm x 50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e\n\u003ca href=\"\/pages\/universal-mounting-specification\"\u003eUMS Heatsink\u003c\/a\u003e Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5941421764,"sku":"DIYP-F5-230","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_0459.png?v=1448506065"},{"product_id":"f-4","title":"F4","description":"\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e250mm x 50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e\n\u003ca href=\"\/pages\/universal-mounting-specification\"\u003eUMS Heatsink\u003c\/a\u003e Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5941468484,"sku":"DIYP-F4-220","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/F-4-1.jpg?v=1455101357"},{"product_id":"honey-badger","title":"The \"Honey Badger\"","description":"\u003cp\u003eThe first Class AB power amplifier to be featured at the diyAudio Store. It has been designed from the ground up with the sonic character, power output and most of all the DIYer in mind. With a basic power output of 150W at 8 ohms, this power amp is sure to have a place in every builder’s projects list. Not to mention its flexibility and adaptability to work with most output devices available locally in wherever country you may be.\u003c\/p\u003e\n\u003cp\u003ePlease visit the \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/214002-diyab-honey-badger-class-ab-power-amp-pair.html\"\u003eHoney Badger Helpdesk Thread\u003c\/a\u003e for any questions you might have and for a definitive list of links to all articles and discussions about the amp itself, the build guide, schematics, and Bill of Materials.  The designer OSTripper is active over in the \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/solid-state\/192431-diyab-amp-honey-badger.html\" target=\"_blank\"\u003eHoney Badger General Discussion Thread\u003c\/a\u003e which is where all the action is.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant note on resistor lead size:\u003c\/strong\u003e The resistor lead holes were intentionally made small by the designer. Please check the lead sizes of the parts in the BOM and use them as your maximum lead thickness before purchasing alternate resistors.\u003c\/p\u003e\n\u003ch2\u003eAdditional Information \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-DIYAB-2V20-diyAB-amp-bom.xls\" target=\"_blank\"\u003eBill of Materials\u003c\/a\u003e \u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/2017-01_Honey_Badger_2.4_BOM_by_mbrennwa.pdf?v=1619657882\"\u003eUnofficial 2.4 Bill of Materials by mbrennwa\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-DIYAB-2V20-diyAB-amp-schematic.pdf\" target=\"_blank\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Annotated_Honey_Badger_2.4_Schematic.pdf?v=1619657915\"\u003eUnofficial 2.4 annotated schematic\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-DIYAB-2V20-diyAB-amp-dimensions.pdf\" target=\"_blank\"\u003eDimensions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/media\/build-guides\/diyaudio-diyab-build-guide-v1.0.pdf\" target=\"_blank\"\u003eBuild Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/solid-state\/192431-diyab-amp-honey-badger.html\" target=\"_blank\"\u003eGeneral Discussion Thread\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable class=\"data-table\" id=\"product-attribute-specs-table\" style=\"width: 100%; height: 97.969px;\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"label\" style=\"width: 51.2389%; height: 19.5938px;\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\" style=\"width: 45.9039%; height: 19.5938px;\"\u003e253mm x 76mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"label\" style=\"width: 51.2389%; height: 19.5938px;\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\" style=\"width: 45.9039%; height: 19.5938px;\"\u003eUMS Heatsink Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"label\" style=\"width: 51.2389%; height: 19.5938px;\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\" style=\"width: 45.9039%; height: 19.5938px;\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\" style=\"height: 19.5938px;\"\u003e\n\u003cth class=\"label\" style=\"width: 51.2389%; height: 19.5938px;\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\" style=\"width: 45.9039%; height: 19.5938px;\"\u003e2.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5941505732,"sku":"DIYP-DIYAB-224","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/Honey_Badger_2.4-2.jpg?v=1508215685"},{"product_id":"burning-amplifier-complementary","title":"Burning Amplifier Complementary Bias \u0026 Output Stage","description":"\u003cp\u003eThis output stage can be used along with your choice of gain stage to create a Burning Amp.(See the Configuration Guide linked below)\u003c\/p\u003e\n\u003cp\u003eThe boards are the output-pair-per-channel configuration recommended by Nelson Pass.  If you want more output devices to make a truly massive amplifier, you will need to order an additional complete set.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlease visit the \u003c\/span\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/214012-burning-amplifiers.html\"\u003eBurning Amplifier Helpdesk Thread\u003c\/a\u003e\u003cspan\u003e for any questions you might have and for a definitive list of links to all articles and discussions about the Burning Amps.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAdditional Information\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAC-S4V20-bom.xls\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eBill of Materials\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAC-S4V20-schematic.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eSchematic\u003c\/a\u003e (\u003cstrong\u003ePLEASE NOTE\u003c\/strong\u003e  This schematic, which is Nelson's original, incorrectly shows 12xIRFP240 output devices. This design uses 6xIRFP240 and 6xIRFP9240. Please study the BOM and PCB part placement very carefully!)\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAC-S4V20-dimensions.zip\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eDimensions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/burning-amplifier-configurations.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eBurning Amplifier Configuration Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable class=\"data-table\" id=\"product-attribute-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e50mm x 50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eUMS Heatsink Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5941630276,"sku":"DIYP-BAC-420","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_0489.png?v=1448506669"},{"product_id":"burning-amplifier-single-ended","title":"Burning Amplifier Single-ended Bias \u0026 Output Stage","description":"\u003cdiv style=\"text-align: left;\"\u003eThe Burning Amplifier series is an ecosystem designed by Nelson Pass comprised of two front ends (feedback, and zero feedback), and two output stages (single ended, and complementary). These 4 parts are all compatible with each other and can be used interchangeably to create 4 different styles of class A amplifier:\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eLocal feedback, Single Ended\u003c\/li\u003e\n\u003cli\u003eLocal feedback, Complementary\u003c\/li\u003e\n\u003cli\u003eZero feedback, Single Ended\u003c\/li\u003e\n\u003cli\u003eZero feedback, Complementary\u003c\/li\u003e\n\u003c\/ul\u003e\nAdditionally, the zero feedback front end has proved very popular as the basis for the \u003ca href=\"https:\/\/diyaudiostore.com\/products\/ba3-burning-preamplifier\"\u003eBA3 Preamplifier\u003c\/a\u003e.\u003cbr\u003e\u003cbr\u003ePlease visit the Burning Amplifier Helpdesk Thread for any questions you might have and for a definitive list of links to all articles and discussions about the Burning Amps.\u003cbr\u003e\u003cbr\u003eBoards designed for mounting active component directly to heatsinks share a common universal mounting specification so you can tap your holes once and then re-use those holes for future projects, very handy if you'd like to experiment with several designs on a single chassis!\u003cbr\u003e\u003cbr\u003ePlease view the Burning Amplifier Configuration Guide to choose the appropriate PCBs for your your desired Burning Amplifier.\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThese boards along with the  with your components and the P-BAGS-1V20 gain stage, then add your own power supply, chassis and heat sinks to complete the \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/www.diyaudio.com\/community\/threads\/burning-amplifier-ba-2.150438\/\" target=\"_blank\"\u003eBA-2\u003c\/a\u003e amplifier in the 3 output pair per channel configuration recommended by Nelson Pass.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePlease visit the \u003c\/span\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/diyaudio-store\/214012-burning-amplifiers.html\"\u003eBurning Amplifier Helpdesk Thread\u003c\/a\u003e\u003cspan\u003e for any questions you might have and for a definitive list of links to all articles and discussions about the Burning Amps.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eAdditional Information\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAS-S4V20-bom.xls\" target=\"_blank\"\u003eBill of Materials\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAS-S4V20-schematic.zip\" target=\"_blank\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/P-BAS-S4V20-dimensions.zip\" target=\"_blank\"\u003eDimensions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/burning-amplifier-configurations.pdf\" target=\"_blank\"\u003eBurning Amplifier Configuration Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e60mm x 50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eMounting holes\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eUMS Heatsink Compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eNumber of boards included\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eLayers\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\"\u003eBoard Revision\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":5941711044,"sku":"DIYP-BAS-4V20","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_0494.png?v=1448506813"},{"product_id":"f4-ba3-transistor-kit","title":"F4\/BA-3 Transistor Kit","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":11592571012,"sku":"DIYM-F4-R2","price":89.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/f4.jpg?v=1454572623"},{"product_id":"f5t-transistor-kit","title":"F5 Turbo Transistor Kit","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":11592587204,"sku":"DIYM-F5T-810","price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/image2.JPG?v=1454572699"},{"product_id":"substitution-cover-slimline","title":"Slimline Substitution: Top or Bottom Cover","description":"\u003cdiv style=\"border: 2px dashed #FF5E5E; padding: 10px;\"\u003e\n\u003cstrong\u003ePlease note - substitution only! \u003c\/strong\u003eThis is not a physical product. It cannot be purchased separately. This is a \u003cem\u003esubstitution request \u003c\/em\u003efor a single \u003cem\u003ecover \u003c\/em\u003ethat can only be purchased \u003cem\u003eat the same time\u003c\/em\u003e as you purchase a \u003cem\u003ecomplete chassis\u003c\/em\u003e.\u003c\/div\u003e\n\u003cbr\u003e\n\u003cp\u003eYou may substitute one or more of your Slimline covers for a different style of cover.  \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eIf your Slimline has \u003cem\u003esteel covers,\u003c\/em\u003e you \u003cspan style=\"text-decoration: underline;\"\u003emust\u003c\/span\u003e choose a \u003cem\u003esteel substitution\u003c\/em\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eIf your Slimline has \u003cem\u003ealuminum covers\u003c\/em\u003e, you \u003cspan style=\"text-decoration: underline;\"\u003emust\u003c\/span\u003e choose an \u003cem\u003ealuminum substitution\u003c\/em\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003ePrices are \u003cstrong\u003eper cover\u003c\/strong\u003e.  They are for the \u003cstrong\u003esubstitution\u003c\/strong\u003e of \u003cstrong\u003eone\u003c\/strong\u003e \u003cstrong\u003ecover\u003c\/strong\u003e from the standard cover to another style. If you need two substitutions, please purchase two substitutions. Top and bottom covers are the same design and are interchangeable - a top will fit on the bottom and vice versa. \u003c\/li\u003e\n\u003cli\u003ePurchasing \u003cstrong\u003eone\u003c\/strong\u003e \"Blank\" substitution means \u003cstrong\u003eone\u003c\/strong\u003e of the standard covers that comes with your Slimline will be replaced with a cover that has no holes other than the 4 small mounting screw holes\u003c\/li\u003e\n\u003cli\u003ePurchasing \u003cstrong\u003eone\u003c\/strong\u003e \"Fully Vented\" substitution means \u003cstrong\u003eone\u003c\/strong\u003e of the standard covers that comes with your Slimline will be replaced with a cover that is covered in full with vents\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hi-Fi 2000","offers":[{"title":"170 Series \/ Steel - Blank","offer_id":14731804868,"sku":"D1-3SL0103170ASOLES","price":1.0,"currency_code":"USD","in_stock":false},{"title":"170 Series \/ Aluminum - Fully Vented","offer_id":14731804932,"sku":"D1-3SLA0103170ASOLS","price":1.0,"currency_code":"USD","in_stock":false},{"title":"170 Series \/ Aluminum - Blank","offer_id":14731804996,"sku":"D1-3SLA0103170CIECS","price":1.0,"currency_code":"USD","in_stock":false},{"title":"230 Series \/ Steel - Blank","offer_id":14731805124,"sku":"D1-3SL0103230CIECOS","price":1.0,"currency_code":"USD","in_stock":false},{"title":"230 Series \/ Aluminum - Fully Vented","offer_id":14731805188,"sku":"D1-3SLA0103230ASOLS","price":1.0,"currency_code":"USD","in_stock":false},{"title":"230 Series \/ Aluminum - Blank","offer_id":14731805252,"sku":"D1-3SLA0103230CIECS","price":1.0,"currency_code":"USD","in_stock":false},{"title":"280 Series \/ Steel - Fully Vented","offer_id":14731805316,"sku":"D1-3SL0103280ASOLES","price":16.0,"currency_code":"USD","in_stock":false},{"title":"280 Series \/ Steel - Blank","offer_id":14731805380,"sku":"D1-3SL0103280CIECOS","price":16.0,"currency_code":"USD","in_stock":false},{"title":"280 Series \/ Aluminum - Fully Vented","offer_id":14731805444,"sku":"D1-3SLA0103280ASOLS","price":16.0,"currency_code":"USD","in_stock":false},{"title":"280 Series \/ Aluminum - Blank","offer_id":14731805508,"sku":"D1-3SLA0103280CIECS","price":16.0,"currency_code":"USD","in_stock":false},{"title":"350 Series \/ Steel - Fully Vented","offer_id":14731805572,"sku":"D1-3SL0103350ASOLES","price":1.0,"currency_code":"USD","in_stock":false},{"title":"350 Series \/ Steel - Blank","offer_id":14731805636,"sku":"D1-3SL0103350CIECOS","price":1.0,"currency_code":"USD","in_stock":false},{"title":"350 Series \/ Aluminum - Fully Vented","offer_id":14731805700,"sku":"D1-3SLA0103350ASOLS","price":1.0,"currency_code":"USD","in_stock":false},{"title":"350 Series \/ Aluminum - Blank","offer_id":14731805764,"sku":"D1-3SLA0103350CIECS","price":1.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_9722-1100x1100.jpg?v=1458863015"},{"product_id":"substitution-cover-pesante","title":"Steel Pesante Substitution: Top or Bottom Cover (Only compatible with Pesante chassis with Steel top and bottom covers)","description":"\u003cdiv style=\"border: 2px dashed #FF5E5E; padding: 10px;\"\u003e\n\u003cstrong\u003ePlease note - substitution only! \u003c\/strong\u003eThis is not a physical product. It cannot be purchased separately. This is a \u003cem\u003esubstitution request \u003c\/em\u003efor a single \u003cem\u003ecover \u003c\/em\u003ethat can only be purchased \u003cem\u003eat the same time\u003c\/em\u003e as you purchase a \u003cem\u003ecomplete chassis\u003c\/em\u003e.\u003c\/div\u003e\n\u003cbr\u003e\n\u003cp\u003eYou may substitute one or more of your Pesante covers for a different style of cover.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan color=\"#ff0000\" style=\"color: #ff0000;\"\u003eThis \u003cem\u003esteel substitution\u003c\/em\u003e is \u003c\/span\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline; color: #ff0000;\"\u003eonly\u003c\/span\u003e\u003c\/em\u003e\u003cspan color=\"#ff0000\" style=\"color: #ff0000;\"\u003e available for a Pesante which already has \u003cem\u003esteel covers\u003c\/em\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan color=\"#ff0000\" style=\"color: #ff0000;\"\u003eIf your Pesante has aluminum covers, please \u003c\/span\u003e\u003cspan color=\"#ff0000\" style=\"color: #ff0000;\"\u003edo not add this product to your cart as it will be incompatible with your chassis and your order will not be able to be fulfilled \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003ePrices are \u003cstrong\u003eper cover\u003c\/strong\u003e.  They are for the \u003cstrong\u003esubstitution\u003c\/strong\u003e of \u003cstrong\u003eone\u003c\/strong\u003e \u003cstrong\u003ecover\u003c\/strong\u003e from the standard cover to another style. If you need two substitutions, please purchase two substitutions. Top and bottom covers are the same design and are interchangeable - a top will fit on the bottom and vice versa. \u003c\/li\u003e\n\u003cli\u003ePurchasing \u003cstrong\u003eone\u003c\/strong\u003e \"10 row steel cover\" substitution means \u003cstrong\u003eone\u003c\/strong\u003e of the standard \"2 or 3 Row\" steel covers that comes with your Pesante will be replaced with a cover that has 10 rows of holes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hi-Fi 2000","offers":[{"title":"300mm \/ Fully Vented 10 Rows Steel","offer_id":14731805828,"sku":"D1-3PE02P03ASOLES","price":1.0,"currency_code":"USD","in_stock":false},{"title":"400mm \/ Fully Vented 10 Rows Steel","offer_id":14731805892,"sku":"D1-3PE04P03400ASOS","price":1.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_9937-1100x1100.jpg?v=1458859863"},{"product_id":"substitution-heatsinks-dissipante","title":"Dissipante Substitution: UMS Heatsinks","description":"\u003cdiv style=\"border: 2px dashed #FF5E5E; padding: 10px;\"\u003e\n\u003cstrong\u003ePlease note - substitution only! \u003c\/strong\u003eThis is not a physical product. It cannot be purchased separately. This is a \u003cem\u003esubstitution request \u003c\/em\u003efor the \u003cem\u003eheatsinks\u003c\/em\u003e that can only be purchased \u003cem\u003eat the same time\u003c\/em\u003e as you purchase a \u003cem\u003ecomplete chassis\u003c\/em\u003e.\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e This substitution will replace \u003cstrong\u003eall\u003c\/strong\u003e the regular heatsinks in your Dissipante chassis with heatsinks pre-drilled and pre-tapped to the \u003ca href=\"http:\/\/diyaudiostore.com\/pages\/universal-mounting-specification\"\u003eUMS specification\u003c\/a\u003e.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4U 300mm UMS Specification: Instead of receiving two regular \"4U 300mm\" heatsinks (Comprised of two pieces of 165x300x40), you will receive two 165x300x40 heatsinks pre-drilled and pre-tapped to the UMS specification\u003c\/li\u003e\n\u003cli\u003e5U 400mm UMS Specification: Instead of receiving two regular \"5U 400mm\" heatsinks (Comprised of four pieces of 210x400x40), you will receive four 210x400x40 heatsinks pre-drilled and pre-tapped to the UMS specification.  When joined together using chassis rails you will have created two \"5U 400mm\" UMS Heatsinks.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hi-Fi 2000","offers":[{"title":"4U 300mm \/ 4U 300mm UMS Specification","offer_id":14731806980,"sku":"D1-SUB-PD-HS-4U300-1","price":1.0,"currency_code":"USD","in_stock":false},{"title":"5U 400mm \/ 5U 400mm UMS Specification","offer_id":14731807044,"sku":"D1-SUB-PD-HS-5U400-1","price":1.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/two_4ux300_UMS_heatsinks.jpg?v=1458799535"},{"product_id":"10mm-aluminum-front-panel","title":"10mm aluminum front panel for Pesante, Dissipante, Slimline or Deluxe chassis","description":"\u003cp\u003e10mm thick, 450mm x 220mm aluminum front panel suitable for Pesante, Dissipante, Slimline or Deluxe chassis.\u003c\/p\u003e","brand":"Hi-Fi 2000","offers":[{"title":"2U \/ Silver","offer_id":21114459268,"sku":"D1-1FRONT1002B","price":1.0,"currency_code":"USD","in_stock":false},{"title":"2U \/ Black","offer_id":21114459332,"sku":"D1-1FRONT1002N","price":1.0,"currency_code":"USD","in_stock":false},{"title":"3U \/ Silver","offer_id":21114459460,"sku":"D1-1FRONT1003B","price":1.0,"currency_code":"USD","in_stock":false},{"title":"3U \/ Black","offer_id":21114459524,"sku":"D1-1FRONT1003N","price":1.0,"currency_code":"USD","in_stock":false},{"title":"4U \/ Silver","offer_id":21114459588,"sku":"D1-1FRONT1004B","price":1.0,"currency_code":"USD","in_stock":false},{"title":"4U \/ Black","offer_id":21114459652,"sku":"D1-1FRONT1004N","price":1.0,"currency_code":"USD","in_stock":false},{"title":"5U \/ Silver","offer_id":21114459716,"sku":"D1-1FRONT1005B","price":1.0,"currency_code":"USD","in_stock":false},{"title":"5U \/ Black","offer_id":21114459780,"sku":"D1-1FRONT1005N","price":1.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_9668-1100x1100.jpg?v=1467195504"},{"product_id":"chassis-baseplate-mini-dissipante","title":"Chassis Baseplate (Mini Dissipante)","description":"\u003cp\u003eBaseplates give the following advantages over using the cover to mount your components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrength\u003c\/strong\u003e: The baseplate will flex less than your covers.  The edge of each side of the baseplate has been cut and bent to create 90' lips\/edges\/flanges which add significant rigidity.  Depending on what your covers are made of, how much material from them has been removed to create vents, and how heavy your components are (we're talking about you, transformers!), you might benefit from a more rigid base.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAesthetics\u003c\/strong\u003e: If you'd like a clean look to your bottom cover and not have holes\/screws\/nuts showing underneath, a baseplate lets you mount everything inside the chassis, keeping the exterior looking sharp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy mounting \/ Less drilling\u003c\/strong\u003e: Being drilled in a 10mm x 10mm hole pattern, it's easy to plan for and attach things to it.  It's also easy to rotate something 90' if you change your mind.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGood for your OCD\u003c\/strong\u003e: There's an odd number of holes running left to right, giving you a perfectly aligned center hole right in the middle for your transformer. Your cover also won't end up looking like swiss cheese as you endlessly \"optimize\" the placement of the other parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuture proof\u003c\/strong\u003e: No matter what you end up using your chassis for in the future, with the convenient 10mm x 10mm pattern you know you'll be able to re-use it for more projects in the future\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e10mm x 10mm hole pattern for mounting compatibility with most diyAudio Store PCBs.  The depth option must match the depth of your chassis - it does not reflect the depth of the baseplate itself (see dimensions below).\u003c\/li\u003e\n\u003cli\u003eAll baseplates are made of 1.2mm galvanized iron\u003c\/li\u003e\n\u003cli\u003eThe holes are spaced in a convenient 10mm x 10mm pattern.  This is compatible with most diyAudio Store PCBs (eg: PSU) and is easy on your brain.\u003c\/li\u003e\n\u003cli\u003eHoles have diameter 4mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMini Dissipante Baseplate Dimensions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor Mini Dissipante chassis that are 230mm wide\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eBaseplate Model 23-200\/250\/300 - 144mm x 170mm (shorter)\u003c\/li\u003e\n\u003cli\u003eBaseplate Model 23-250\/300 - 144 x 240mm (longer)\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eFor Mini Dissipante chassis that are 330mm wide\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eBaseplate Model 33-200\/250\/300 - 244mm x 170mm\u003c\/li\u003e\n\u003cli\u003eBaseplate Model 33-250\/300 - 244mm x 240mm\u003c\/li\u003e\n\u003cli\u003eBaseplate Model 33-400 - 244mm x 360mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/ul\u003e","brand":"Hi-Fi 2000","offers":[{"title":"Mini Dissipante 230mm wide \/ 200\/250\/300mm deep (baseplate is 144x170mm)","offer_id":12372491927586,"sku":"D1-1BASEMNPD23\/200","price":10.0,"currency_code":"USD","in_stock":false},{"title":"Mini Dissipante 230mm wide \/ 250\/300mm deep (baseplate is 144x240mm)","offer_id":12372501757986,"sku":"D1-1BASEMNPD23\/250","price":11.0,"currency_code":"USD","in_stock":false},{"title":"Mini Dissipante 330mm wide \/ 200\/250\/300 deep (baseplate is 244x170mm","offer_id":12372513259554,"sku":"D1-1BASEMNPD33\/200","price":11.0,"currency_code":"USD","in_stock":false},{"title":"Mini Dissipante 330mm wide \/ 250\/300mm (baseplate is 244x240mm)","offer_id":12372520468514,"sku":"D1-1BASEMNPD33\/250","price":12.0,"currency_code":"USD","in_stock":false},{"title":"Mini Dissipante 330mm wide \/ 400mm deep (baseplate is 244 x 360 mm)","offer_id":12372520894498,"sku":"D1-1BASEMNPD33\/400","price":14.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC_4759-1100x1100.jpg?v=1531795572"},{"product_id":"analog-crossover-network-basic-kit","title":"Analog Crossover Network: Basic Kit","description":"\u003cp\u003e\u003cstrong\u003ePCB Dimensions\u003c\/strong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e: 5 inch x 5 inch \/ 12.5 cm x 12.5 cm\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":12559232335906,"sku":"DIYK-XOESS-S10","price":33.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC7079.jpg?v=1534817475"},{"product_id":"analog-crossover-network-lx-mini-kit","title":"Analog Crossover Network: LX Mini Crossover Kit","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":29312808255522,"sku":"DIYB-ACN-1E1T","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC7085.jpg?v=1534817516"},{"product_id":"m2x","title":"M2X","description":"\u003cp\u003eThe M2x is based upon the Nelson Pass \/ \u003ca href=\"https:\/\/www.firstwatt.com\/product\/m2\/\"\u003eFirst Watt M2 amplifier\u003c\/a\u003e. However, the first \"buffer\" stage of amplification has been placed on a removable daughter board, making it extremely easy to swap-in different first stage circuits. A total of five first stage circuit designs are provided, and naturally one of them is the Nelson Pass \/ First Watt original.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"http:\/\/www.diyaudio.com\/forums\/pass-labs\/321925-diyaudio-watt-m2x.html\"\u003eRead the M2X thread on diyAudio\u003c\/a\u003e to learn more and join in the discussion.\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"http:\/\/www.diyaudio.com\/forums\/pass-labs\/321925-diyaudio-watt-m2x.html\"\u003eM2x\u003c\/a\u003e is a Push-Pull Class A amplifier circuit, with zero global feedback. It consists of 3 stages: an input buffer circuit (on a daughter card), followed by a passive auto-transformer for voltage gain, and finally a Class A MOSFET push pull output buffer. The sound of the M2x, as Nelson Pass puts it, is \"relaxed and lively.\"\u003cbr\u003e\u003cbr\u003eFive different input stage options are provided on PCB daughter cards:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cstrong\u003eISHIKAWA\u003c\/strong\u003e: \u003c\/span\u003eThe Nelson Pass original using Toshiba JFETs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMOUNTAIN VIEW:\u003c\/strong\u003e A single ended Class A circuit using a Fairchild JFET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTUCSON\u003c\/strong\u003e: An IC opamp circuit using a highly regarded JFET-input chip from Burr Brown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAUSTIN\u003c\/strong\u003e: A fully complementary, symmetric Diamond Buffer circuit using discrete bipolar transistors from ON Semi\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNORWOOD\u003c\/b\u003e: An Analog Devices JFET opamp followed by a high bandwidth video driver (110 MHz!) from Harris\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThese different input circuit designs allow a builder many options, particularly when sourcing electronic components. For example, during times when the JFETs used in Nelson Pass's original (K170 + J74) are out of stock, one of the other daughter cards can be sourced, stuffed, soldered, and enjoyed in the listening room. Some early M2x builders report that they prefer the sound of these other cards, even more than the Nelson Pass original. Try them yourself and discover which one(s) YOU prefer.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHow might someone choose which of these to build? (Or, which of these to build \u003c\/span\u003e\u003ci\u003efirst?\u003c\/i\u003e\u003cspan\u003e) Here are some thoughts.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eISHIKAWA\u003c\/strong\u003e (using Toshiba or LS JFETs) has the absolutely lowest parts count and is the easiest to solder together. But those FETs are hard to find.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eTUCSON\u003c\/strong\u003e using the thru-hole OPA604 chip, is the lowest parts count board that doesn't use unobtainium devices. And the OPA604 opamp has JFET inputs, so if you love JFETs, it's one of the opamps you probably know and adore. Alternatively, TUCSON u\u003c\/span\u003e\u003cspan\u003esing the SMD OPA1611 chip, is the lowest distortion input stage of them all. Even lower than the Nelson Pass original. It only has one surface mount part; the rest of the board is thru-hole.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eNORWOOD\u003c\/strong\u003e is all-SMD, just like the entire electronics industry has been for the last 20 years. Norwood includes a 200 mA driver IC, and a JFET input opamp from Analog Devices. Its output current capability is at least a factor of five greater than any of the other M2x input stages. If you're at all concerned about the input impedance of the output devices at HF, reflected from the transformer secondary back into the primary, Norwood can drive it better than all the others.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eMOUNTAIN VIEW\u003c\/strong\u003e uses single-ended, class A, discrete circuitry and no feedback. If you are a big believer in single ended class A, if you love this quote from a famous article by Nelson Pass...\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 30px;\"\u003e\u003cem\u003e\"For reproducing music as naturally as possible, push-pull operation is not the best approach. Air is not symmetric and does not have a push-pull characteristic. ... Only one linear circuit topology delivers the appropriate characteristic, and that is the single-ended amplifier. Single ended amplification only comes in pure class A,\"\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e...then you probably are interested in listening to the Mountain View input stage.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eAUSTIN\u003c\/strong\u003e is a thru-hole board with 4X more components than the other boards; its resistors are \u003c\/span\u003e\u003ci\u003emounted vertically\u003c\/i\u003e\u003cspan\u003e to save PCB area. This permits a Diamond Buffer circuit with high performance, precision current source loads. Builders who love parts substitutions \/ optimizations will appreciate that Austin's PCB silkscreen doesn't indicate transistor orientation. Instead, transistor pins are labeled B, C, E in a perfect circle; allowing you to drop in Japanese 2SA\/2SC transistors (pinout ECB) or European BC transistors (pinout CBE) or American 2N transistors (pinout EBC) however you please. Austin is recommended ONLY for experienced builders. If you're a newbie, hire someone to solder your Austin board!!\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003ePower supply requirements\u003c\/h4\u003e\n\u003cp\u003eA bipolar power supply of (+\/- 24V) is required. The PSUs for almost all First Watt amplifiers including the F4, F5, F6, M2x, Aleph J, and Aleph Jzm are identical. The same PSU can be used for all of them.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003ca href=\"https:\/\/diyaudiostore.com\/products\/simple-linear-bipolar-power-supply?_pos=1\u0026amp;_psq=simple\u0026amp;_ss=e\u0026amp;_v=1.0\" target=\"_blank\"\u003eSimple Linear Bipolar Power Supply\u003c\/a\u003e is the choice for DIYers that prefer a higher performance power supply, but enjoy the convenience of a full kit. For builders that prefer to choose their own parts, the PCBs are also available.\u003c\/li\u003e\n\u003cli\u003eThe \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/power-supplies-accessories\/products\/universal-psu\" target=\"_blank\"\u003eUniversal Power Supply\u003c\/a\u003e PCBs allow the experienced DIYer to choose every part of their PSU or use what they have in their spare parts bin.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eChassis suggestions\u003c\/h4\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/chassis-enclosure\/products\/2025-deluxe-chassis-3u\" target=\"_blank\"\u003e3U Deluxe\u003c\/a\u003e is an excellent choice. For builders that want more space and\/or may want to build a bigger amplifier in the future, the \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/chassis-enclosure\/products\/2025-deluxe-chassis-4u\" target=\"_blank\"\u003e4U Deluxe\u003c\/a\u003e or \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/chassis-enclosure\/products\/2025-deluxe-chassis-4u\" target=\"_blank\"\u003e5U Deluxe \u003c\/a\u003eare great choices.  We also have a \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/chassis\/products\/deluxe-chassis-back-panel-parts-kit\"\u003eback panel parts kit\u003c\/a\u003e to make life easier, and don’t forget the \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/consumables\/products\/keratherm-transistor-insulators\"\u003eKeratherm\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch4\u003eOutput Power\u003c\/h4\u003e\n\u003cp\u003eAs with most First Watt amplifiers, the power output is 25WPC into 8 ohms.\u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":12699843002402,"sku":"DIYP-M2X-C10","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC0687.jpg?v=1536784997"},{"product_id":"korg-nutube","title":"Korg Nutube 6P1 Dual Triode","description":"\u003cp\u003eThe Korg Nutube 6P1 is a new, miniature, low-power dual directly-heated triode device. It was developed by Korg (of musical instrument fame) and Noritake Itron, a manufacturer of vacuum fluorescent displays, in Japan. Although it is a true directly heated triode, it is manufactured differently than traditional vacuum tubes, which gives it some unique attributes.\u003c\/p\u003e\n\u003cp\u003eElectrically, the Nutube 6P1 is somewhat comparable to the battery-powered “hearing aid” tubes. It operates on very low voltages – the filament is rated at 700mV, and plate supply voltages can be as low as 5V.\u003c\/p\u003e\n\u003ch2\u003eElectrical Characteristics\u003c\/h2\u003e\n\u003cp\u003eThe Nutube is a very low power device – the filament consumes only 12mW of power per triode, and the plate dissipation is rated at only 1.7mW! The consequence of such low power operation is that, compared to most traditional vacuum tubes, it also has quite low transconductance (gm). \u003c\/p\u003e\n\u003cp\u003eRefer to Table 1 for a summary of the electrical specs of the 6P1.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\u003cstrong\u003eTypical Characteristics – Nutube 6P1 (each triode)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nFilament Voltage  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nVf\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n0.7V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nFilament Current  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nIf\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n17mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nPlate Voltage  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nVa\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nGrid Voltage  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nVg\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n+2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nPlate Current  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nIa\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n32µA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nAmplification Factor  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nµ (mu)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n14.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nTransconductance  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\ngm\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n54µS (54µA\/V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nPlate Resistance  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nRp\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n330kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nGrid current  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nIg\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n6µA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cstrong\u003eMaximum Ratings – Nutube 6P1\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nFilament Voltage  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nVf\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n0.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nPlate Voltage  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nVa\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n80V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nPlate Dissipation  \u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\nPa\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n1.7mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan style=\"color: #666666;\"\u003eTable 1 - Nutube 6P1 Electrical Characteristics\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eEven though the numbers are a bit different than a common tube like the 12AX7, a first look at the plate characteristic curves (Figure 1) will look very familiar.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Figure1_1024x1024.png?v=1547179235\" alt=\"Figure 1 - Plate Characteristics\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003eFigure 1- Plate Characteristics\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe curves are typical for a triode and are quite linear. However, when selecting an operating point and load line, one must observe the maximum plate dissipation and maximum permitted plate voltage, which constrains operation significantly. Also notable is the fact that to get much of an output signal with a low plate voltage, the grid must be operated in the positive region – class A2.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eSince much of the advantage of the Nutube is the ability to be operated on low-voltage power supplies, most applications will utilize a positive grid bias. This means that some grid current will flow, and a somewhat low impedance source (like a source follower) must be used to drive the grid.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe grid current is shown in Figure 2 below. You can see that the grid current, although only tens of microamps, is significant when compared with the low plate current.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Figure2_1024x1024.png?v=1547179313\" alt=\"Figure 2 - Nutube 6P1 Grid Current\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003eFigure 2 - Nutube 6P1 Grid Current\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cbr\u003eMechanical and Physical Attributes\u003c\/h3\u003e\n\u003cp\u003eThe Nutube is manufactured by Noritake-Itron in Japan, using a similar process as vacuum fluorescent displays. It is, in fact, a one-pixel VFD device. The plate is coated with a phosphor just like a VFD, and it glows a blueish-white color when plate current is flowing.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eA close look at a 6P1 triode (Photo 1) shows a very fine coated wire running across the device. This is the filament. Even though it is heated enough to emit electrons, it does not get hot enough to show a visible glow. Below the filament there is a fine, open mesh – this is the grid. Below that is a metal plate with the phosphor (glowing) applied – this is the plate.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Photo1_1024x1024.png?v=1547179388\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003ePhoto 1- Nutube 6P1 Close-Up\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eTwo triodes are packaged together into one glass package, which is again borrowed from VFD manufacturing. It looks a bit like an old 40-pin DIP IC package, but has pins only along one edge. See Photo 2.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Photo2_1024x1024.png?v=1547179474\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003ePhoto 2 - Nutube 6P1\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe two filaments share a common center terminal. In most applications, this terminal is at ground potential. Because of this, circuits like cathode followers or differential amplifiers are a bit more difficult to implement, as they require a floating filament supply.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eOne notable side effect of the construction is that the filament wire, under tension, is a lot like a piano string - when subjected to a shock or mechanical impact, it vibrates at an audible frequency (maybe 5kHz or so). This microphonic behavior seems identical to that of the subminiature battery tubes, and could cause problems when the Nutube used in low signal applications. In some cases it may be desirable to mechanically isolate or shock mount the tube.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe package is a glass sandwich, 45mm x 16mm, and is designed to mount to a PC board, with pins spaced on 2mm centers (Figure 3). A small metal disc on the back of the package is used to seal the port where the air is exhausted.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Figure3_1024x1024.png?v=1547179521\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003eFigure 3- Nutube 6P1 dimensions\u003c\/span\u003e\u003cbr\u003e \u003c\/p\u003e\n\u003ch2\u003eReference and Example Circuits\u003c\/h2\u003e\n\u003cp\u003eThe basic application circuit provided by Korg (Figure 4) uses simple JFET source followers to buffer the signal in and out of the Nutube. An input buffer is used to support the relatively low impedance looking into the grid and bias source. The output buffer is needed to drive anything but very high impedance loads, due to the low transconductance and resultantly high plate resistance of the tube.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Figure4_1024x1024.png?v=1547179583\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003eFigure 4- Korg Application Circuit\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThis circuit is intended to operate from a single power supply between about 5V to 30V, plus a regulated 3.3V supply (typically from an LDO regulator). Bias is adjustable from 0 to +3.3V. To support the grid current, a relatively low value resistor (33kΩ) is used to provide DC bias to the grid. This then mandates that a large (10µF) coupling capacitor be used to couple the audio signal. There is no doubt some bias shift with signal level in this arrangement, but with the values shown it doesn’t appear to be significant.\u003c\/p\u003e\n\u003cp\u003eFilament power is obtained from the 3.3V supply with a dropping resistor.\u003c\/p\u003e\n\u003cp\u003eAnother circuit example is shown in Figure 5 below. In this circuit, ±18V supplies are used, as well as a higher voltage B+ voltage for the plate (in this case, about 75V). Both triode sections are connected in parallel, to increase gm and lower the noise level. A DC-coupled JFET follower is used to directly drive the grid at zero bias, and an opamp is used to buffer the output.\u003c\/p\u003e\n\u003cp\u003eThis is a gain stage that I used in the Apex Sangaku headphone amplifier. Note that an opamp with very low input current offset and noise is needed here, as a large resistor (1MΩ in this case) is needed at the opamp input due to the high Rp of the 6P1.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Figure5_1024x1024.png?v=1547179646\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003eFigure 5- Split-Supply Application Example\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eAudio Performance\u003c\/h2\u003e\n\u003cp\u003eAs with any vacuum tube, the audio performance – gain and distortion in particular – are dependent on the circuit implementation. Bias point and plate loading make enormous differences in the performance of an amplifier stage.\u003c\/p\u003e\n\u003cp\u003eI ran some tests using the Korg application circuit, at the recommended bias and plate load, to see what the audio performance looks like. All of these tests were run with a grid bias voltage of +2.5V, and a plate load resistance of 330k.\u003c\/p\u003e\n\u003cp\u003eWith a single +12V supply, the circuit provided a gain of about 2.6x. With 0.5V RMS in, and 1.35V RMS out, THD was around 1%. The THD increases with level as one would expect, as shown in Figure 6 below:\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Figure6_1024x1024.png?v=1547179734\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003eFigure 6 - 12V gain and distortion\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eIn this plot, the horizontal axis is the input voltage. The green line is THD, read on the left scale. The yellow line is the output voltage, read on the right scale. You can see the compression of the waveform at higher levels, causing the yellow trace to bend downwards.\u003c\/p\u003e\n\u003cp\u003eTHD reaches 5% at about 3.1V out.\u003c\/p\u003e\n\u003cp\u003eAt this operating point, an FFT shows that the 2nd and 3rd harmonic distortion products were nearly equal in level at -40dB, with dropping levels for higher order products:\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Figure7_1024x1024.png?v=1547179781\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003eFigure 7 - 12V FFT\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eUsing the same operating point and load, things improve considerably at a higher supply voltage. Here is the same circuit running from 24V:\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Figure8_1024x1024.png?v=1547179832\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003eFigure 8 - 24V gain and distortion\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eYou can see that the gain has increased to about 3.5x. THD is lower, with 0.7% at 0.5V in and 1.8V out. 5% THD isn’t reached until the output reaches 6.5V RMS.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe FFT at 24V shows that the 2nd harmonic product has dropped, and now the 3rd is the highest, at about -43dB.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Figure9_1024x1024.png?v=1547179877\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003eFigure 9 - 24V FFT\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eOf course, by changing the bias and\/or plate load, you can tune the harmonics to look however you want. A small change in bias will change the relative levels of the 2nd and 3rd order products.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eNegative feedback can also be employed to trade lower gain for lower distortion.\u003c\/p\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eThe Nutube 6P1 is intended to be used in various audio applications, mostly in musical instrument applications. It’s very low power requirements enable its use in battery powered systems, ideal for a product like a guitar effects pedal.\u003c\/p\u003e\n\u003cp\u003eHowever, due to its low gm and correspondingly high noise, it is difficult to use it in low-level applications like the input stages of microphone or phono preamps.\u003c\/p\u003e\n\u003cp\u003eIn some cases, the Nutube can also find use in high fidelity audio equipment.\u003c\/p\u003e\n\u003cp\u003eAs you might also conclude based on the audio performance measurements, I view the Nutube not so much as an active amplifying device as a signal processing element. Yes, it does provide voltage gain – but if accurate voltage gain is your goal, you are much better served by using other devices, both tube and solid state.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eIn a guitar amplifier, it can be used to provide distortion similar to that of a conventional tube, with much lower voltage and power requirements. In Hi-Fi, it can be used to emulate the harmonic characteristics of single-ended triode power amplifiers. Not everybody’s “cup of tea” to be sure, but it opens up some interesting possibilities.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eAs an experiment, I designed and built a hybrid amplifier using the Nutube 6P1 in conjunction with a self-oscillating class-D amplifier IC, the MP7770 from Monolithic Power Systems. This combination yields about 50 watts output power, and harmonically it is very much like a large single-ended triode amplifier. It runs on a single 28V power supply and each channel occupies only a few square inches of PCB space, certainly smaller and much less expensive than a big tube amp.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Photo3_1024x1024.png?v=1547179963\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003ePhoto 3- Nutube \/ Class-D Hybrid Amplifier\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eIn this amplifier, I set the MP7770 class-D circuit up for slightly lower gain than it would normally have, and used the Nutube 6P1 as an input stage, feeding a JFET phase splitter. Since it is powered from a single 28V supply, I used a circuit similar to the Korg reference circuit, with a couple of differences (see Figure 6). I connected both triodes in parallel, and also added some plate-to-grid feedback. With a positive grid bias, it’s easy to add feedback by simply adding a resistor.\u003c\/p\u003e\n\u003cp\u003eThis type of feedback stabilizes both the DC operating point and reduces distortion. With this arrangement, it is easy to tune the stage to have whatever gain and harmonic profile you want, as you can vary the plate load resistor, bias voltage, and negative feedback.\u003c\/p\u003e\n\u003cp\u003eThe MP7770 amplifier has quite low distortion by itself (I measured about 0.02% at 1 watt), but like most class-D amplifiers it does have low level harmonics that extend to many times the fundamental. A theory of harmonic masking says that higher amplitude, lower order harmonics mask the audibility of higher order harmonics. So the hope here was that the sound of the resulting hybrid amplifier will be dominated by the Nutube input stage, with its relatively large amounts of low-order (mostly 2nd harmonic) distortion. It does in fact measure very similarly to a large single-ended tube amplifier. Those that have heard it agree that it does indeed sound like a single-ended triode amplifier, but has improved damping due to the low output impedance of the class-D circuit.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Figure10_1024x1024.png?v=1547179987\" alt=\"\"\u003e\u003cbr\u003e\u003cspan style=\"color: #666666;\"\u003eFigure 10- Class-D Amplifier Input Stage\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eConclusion\u003c\/h3\u003e\n\u003cp\u003eThough it certainly won’t make conventional small tubes like the 12AX7 obsolete, the Korg Nutube can be a useful device in audio. I expect it will find many uses in musical instrument amps, guitar effects, and high fidelity. Its low power and low operating voltage makes it a natural for experimentation by those not familiar or comfortable working with the high voltages usually used with tube circuits.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eFor more information about the Nutube, visit \u003ca href=\"https:\/\/www.korgnutube.com\"\u003ewww.korgnutube.com\u003c\/a\u003e and \u003ca href=\"http:\/\/www.nutube.us\"\u003ewww.nutube.us\u003c\/a\u003e. See also the \u003ca href=\"https:\/\/diyaudiostore.com\/products\/b1-buffer-with-korg-triode-pcb-and-jfets\"\u003eKorg Nutube B1\u003c\/a\u003e project here in the store.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":15913769861154,"sku":"DIYE-NU6P1-1K0","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/Korg_Nutube.png?v=1547178742"},{"product_id":"korg-nutube-b1-pcb-and-jfets","title":"B1K Essentials","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":16101218811938,"sku":"DIYK-B1NTF-110","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC8521.jpg?v=1551996439"},{"product_id":"starving-student-ii","title":"Starving Student II HPA Complete Kit","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":16176150282274,"sku":"DIYB-SSII-1K1C","price":289.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/Main_Photo.jpg?v=1570590400"},{"product_id":"noir-headphone-amplifier","title":"Noir Preamplifier \u0026 HPA PCB Set","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":30182423396386,"sku":"DIYP-NOIR-V3","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/Audiophile-Noir-HPA_0063.jpg?v=1571610872"},{"product_id":"high-voltage-delay-for-tube-amplifiers","title":"Linear Audio High-voltage Delay for Tube Amplifiers V4","description":"\u003cp\u003eThis high voltage delay for tube amplifiers was designed by Jan Didden of \u003ca href=\"https:\/\/linearaudio.net\/\"\u003eLinear Audio\u003c\/a\u003e and \u003ca href=\"https:\/\/www.audioxpress.com\/article\/you-can-diy-a-high-voltage-delay-for-tube-amplifiers-the-sequel\"\u003epublished in the October 2019 issue of audioXpress\u003c\/a\u003e. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eConstruction and article download\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eFull schematics, board layout, parts list and construction tips are in the \u003ca href=\"https:\/\/www.audioxpress.com\/article\/you-can-diy-a-high-voltage-delay-for-tube-amplifiers-the-sequel\"\u003eaudioXpress article\u003c\/a\u003e. Our friends at AX have courteously agreed to make the article available for \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/psudel_diya_bare.pdf\"\u003efree download\u003c\/a\u003e for diyaudio members. The Bill of Materials is in the article.\u003c\/p\u003e\n\u003cp\u003eNote that the kit as provided has an absolute max input voltage of 500V. There is an option to extend the absolute max input voltage to 600V, by replacing the supplied IXTP1R6N50D2 with an IXTP01N100D, but these are not readily available.\u003c\/p\u003e\n\u003cp\u003eAlso, the V4 board has a position for D5 near the power MOSFET (not shown in the picture). This is a 12V, 0.4W or 0.5W zener diode added as additional protection at the request of some users.\u003c\/p\u003e\n\u003cp\u003eThe diyAudio kit contains the PCB, the controller, the two power FETs and the low current LED. Everything else is common stuff you may already have or can easily get.\u003c\/p\u003e\n\u003cp\u003eGet the article, get the kit, make your tube amp so much more reliable and prolong tube life. What's not to like?\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy you need it\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTube heaters need some time to heat up, before a tube starts conducting. Depending on the tube type this can range anything from a dozen seconds to a minute. In itself this is no problem – you just wait a little bit before your music starts playing.\u003c\/p\u003e\n\u003cp\u003eBut normally the high-voltage supply for that tube comes on at the same time as the heater voltage comes on, often supplied from the same transformer. That means that the tube sits there for up to a minute with high-voltage applied and no conduction. This may shorten tube life; it depends on the tube type and the actual high voltage,  and the jury is still out on how significant it is, but the effect is known.\u003c\/p\u003e\n\u003cp\u003eAnother issue is that the high voltage initially, when the tubes do not yet draw current, can be quite a bit higher than the voltage under load, putting additional stress on the tubes and possibly the high-voltage capacitors. up, before a tube starts conducting. Depending on the tube type this can range anything from a dozen seconds to a minute. In itself this is no problem – you just wait a little bit before your music starts playing.\u003c\/p\u003e\n\u003cp\u003eBut normally the high-voltage supply for that tube comes on at the same time as the heater voltage comes on, often supplied from the same transformer. That means that the tube sits there for up to a minute with high-voltage applied and no conduction. This may shorten tube life; it depends on the tube type and the actual high voltage,  and the jury is still out on how significant it is, but the effect is known.  Another issue is that the high voltage initially, when the tubes do not yet draw current, can be quite a bit higher than the voltage under load, putting additional stress on the tubes and possibly the high-voltage capacitors.\u003c\/p\u003e\n\u003cp\u003eSo we should not take chances with limiting the life of our precious tubes, and switch on the high voltage only after the cathodes have been properly heated up. I set about to design this unit, making it self-sufficient so no separate supply is needed. For flexibility, the delay can be simply set to anything between 20 seconds and 254 seconds, which should cover all requirements.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eThe circuit\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe small pcb is easy to integrate even in existing tube amps, and it switches on the high voltage on a zero mains crossing to avoid loud thumps in the speaker. And, of course, no impact on amplifier audio performance!\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/image2_grande.png?v=1570536796\" alt=\"Circuit\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe topology is shown in \u003cstrong\u003efigure 1\u003c\/strong\u003e. By inserting the switch in the return line to the power transformer I leave everything after the last reservoir cap unchanged. So there is no impact on the power supply quality and no messing up any carefully laid out ground circuitry. It can be used either with a bridge-type rectifier or a center-tapped secondary with a double-phase rectifier as shown.\u003c\/p\u003e\n\u003cp\u003eWith a Center Tap transformer, the board is connected between Gnd and Center Tap. With a full bridge rectifier, it is connected between ground and the gnd output of the diode bridge. Easy, simple, no risk.\u003c\/p\u003e\n\u003cp\u003eThe unit is powered by a very small current stolen from the high voltage, the Vcap connection.\u003c\/p\u003e\n\u003cp\u003eA small controller chip is used for all the precise timing actions. This chip is only active at switch-on, and when the supply is switched on, it turns itself off and goes to sleep. The kit includes the controller chip that fits in a standard DIL08 socket. \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDelay time\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe controller is set for a delay of 30 seconds out of the box. You can set it to your needs as follows. After installing the board and verifying it works, switch the amp off. Determine the delay you'd want to set, and divide that number by two. Place jumper JP1, and switch on the amp. The LED will start flashing in a 2 second rhythm, so you count off the number you have previously determined. When you get to zero, pull off the jumper. That's all – you have now set the delay to the time you want!\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eImportant note: be careful when handling a jumper with the amp on, since high voltage is present on the board. \u003cu\u003eYou\u003c\/u\u003e are responsible for your safety, not me, not the publisher. If you anticipate experimenting, you could replace the jumper with one of those small PCB toggle switches, they should fit the 0.1in pitch, but use a switch with a plastic or isolated lever. Jumpers are available with a little extra 'handling strip' so you can remove them without touching the jumper itself. Better yet, use a pliers with insulated handles.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe LED that flashes during the delay stays on or goes out after the delay has passed. This is set by jumper J5. If J5 is present, the LED goes out after the delay. This saves a few high-voltage milliamps and is preferred if you already have a pilot light on your amp front panel. \u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eThe Specs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThere's only a few: absolute max voltage (that is the max at your supply cap, when switching on the amp, before it is warmed up!): 500V*. This is where the big guys would say: 'exceeding this maximum spec may permanently damage the device'... Max high voltage supply current that can be switched has no practical limit; if you have an amp that takes more than a couple of amps, you probably operate a transmitter and even then, no sweat! The delay time default is 30 seconds and can be changed to any value, in 2 sec steps, between 20 and 254 seconds.\u003cbr\u003e\u003cbr\u003e*There is an option to extend the max voltage to 600V, by replacing the supplied IXTP1R6N50D2 with an IXTP01N100D, but these are not readily available.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePCB is \u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003e41 x 34mm. It has two mounting holes on one long side with a distance of 36mm.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":30381252968482,"sku":"DIYLA-HVDEL-V4","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/assembled_psudel_-_on_white.jpg?v=1570537896"},{"product_id":"waynes-ba18-pre-amp-pcb","title":"BA2018 Linestage PCB","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":31661837418569,"sku":"DIYP-WBA18LS","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/Waynes-Pre-2018_0036.jpg?v=1593322511"},{"product_id":"rk27-breakout-pcb","title":"RK27 Breakout PCB","description":"\u003cp\u003eThis PCB assists in properly connecting wires to an Alps RK27 potentiometer.  Most Alps RK27 potentiometers have pins that are not intended for direct soldering to wiring. This board simply makes life a little easier.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePCB Dimensions: 31.5mm x 36mm\u003c\/li\u003e\n\u003cli\u003eConnector strip spacing: 5mm, compatible with (example) \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/phoenix_contact_1729160_en.pdf?v=1774272376\"\u003ePhoenix Contact 1729160\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":31661950763081,"sku":"DIYP-RK27BREAK","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/IMG_2513_6bc55f0d-cb18-4650-8f5d-23e98e456662.jpg?v=1771257281"},{"product_id":"diy-biamp-6-24-crossover","title":"DIY Biamp 6-24 Crossover","description":"\u003cp\u003eThe DIY BIAMP 6-24 kit is a stereo analog active bi-amp crossover circuit designed for high flexibility. Featuring 12 discrete JFET buffer circuits operated without negative feedback, it offers 16 continuously adjustable filter elements in two low-pass and two high-pass filters with slopes of 6, 12, 18, or 24 dB per octave and various “Q” characteristics. It has flexibility not generally offered by crossover products have “textbook” characteristics, allowing more detailed tailoring of filters around the actual character of different loudspeaker drivers.\u003c\/p\u003e\n\u003ch4\u003eLinks\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.diyaudio.com\/community\/threads\/diy-biamp-6-24-crossover.357657\/\"\u003eDIY Biamp 6-24 discussion thread\u003c\/a\u003e on diyAudio\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli class=\"column\"\u003e\n\u003ca href=\"https:\/\/www.firstwatt.com\/wp-content\/uploads\/2023\/12\/art_diy-biamp_6-24_-crossover.pdf\"\u003eDIY Biamp 6-24 article\u003c\/a\u003e on First Watt\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli class=\"column\"\u003e\n\u003ca href=\"https:\/\/guides.diyaudio.com\/Guide\/Pass+6-24+Crossover\/13\" rel=\"noopener\" target=\"_blank\"\u003eBuild Guide\u003c\/a\u003e by 6L6\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePhotography by \u003ca href=\"https:\/\/thussfarrell.com\/\"\u003eThuss and Farrell\u003c\/a\u003e.\u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":31765939322953,"sku":"DIYK-XO624BI","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/PassDIY-Biamp-6-24-XO-PCB-Kit.jpg?v=1688174130"},{"product_id":"linear-audio-t-reg","title":"Linear Audio T-reg V5","description":"\u003ch2\u003eA high-voltage, low noise, fully protected regulator for tube circuits\u003c\/h2\u003e\n\u003cp\u003eT-reg is a high voltage regulator aimed at tube-level high voltage amplifiers. Diyaudio offers a partial kit for this unit, consisting of the PCB, the high speed opamp, the series pass MOSFET and a current source MOSFET. The PCB comes with pre-installed Constant Current source and reset pushbutton. Other parts are generic and probably in most people’s parts bins or easily available (see BOM).\u003c\/p\u003e\n\u003cp\u003eT-reg can provide an output voltage between 0 (probably less useful) up to 500V, at currents up to 400mA. T-reg accepts input voltages from a transformer\/ rectifier\/capacitor supply up to a maximum of 500V.\u003c\/p\u003e\n\u003cp\u003ePerformance is very good, with less than 10uV broadband noise, and less than 20mΩ output impedance. That means a clean supply that doesn't sag with varying load. The PCB has an on-board heatsink for the pass device, but the pass device can also be mounted on a larger heatsink or on the chassis for high current applications.\u003c\/p\u003e\n\u003cp\u003eBoth the output voltage and the current limit can be set by a single resistor.  If the current limit is exceeded for more than a fraction of a second, the regulator shuts down to protect itself and the load.\u003c\/p\u003e\n\u003cp\u003ePCB size is approximately 3.1 x 2.3 inch (78 x 58 mm).\u003c\/p\u003e\n\u003cp\u003eDesigned by Jan Didden of \u003ca href=\"https:\/\/linearaudio.net\/\"\u003eLinear Audio\u003c\/a\u003e.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOther parts are generic and probably in most people’s parts bins or easily available (see BOM).\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMore Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/T-reg_5_article_diyaudio.pdf?v=1612255814\"\u003eT-Reg Article\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/T-reg_TS-5_diyaudio_BoM.xlsx?v=1612255830\"\u003eT-Reg BOM\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Teaser_full_cct.pdf?v=1612255857\"\u003eT-Reg Circuit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/Teaser_pcb_stuffing.PNG?v=1612255864\"\u003eT-Reg Stuffing Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.diyaudio.com\/forums\/group-buys\/344165-buy-jans-voltage-regulator.html\"\u003eT-Reg Discussion Thread\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":31929546571849,"sku":"DIYLA-HVREG-V5","price":69.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DIY-Audio-HVREG-BoardwParts.jpg?v=1613171664"},{"product_id":"binding-posts","title":"Gold Plated Binding Posts","description":"\u003cul\u003e\n\u003cli\u003eSolid brass body\u003c\/li\u003e\n\u003cli\u003eGold plated\u003c\/li\u003e\n\u003cli\u003eFast-on connector (Tabs are 6.3mm (1\/4\") wide x 9.0mm long)\u003c\/li\u003e\n\u003cli\u003eKeyed washer to prevent turning when installed\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eKey fits into all Deluxe Chassis \/ VFET rear panels\u003c\/li\u003e\n\u003cli\u003eShort 10mm thread ideal for conserving space when mounting inside amplifier chassis\u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003eManufactured for us and to our requirements in Taiwan\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/binding_post_specs_v4.pdf?v=1677805446\"\u003eDrilling Diagram\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":39292342337609,"sku":"DIYX-BP-AG104","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DIYX-BP-AG104-2xPair.jpg?v=1622440586"},{"product_id":"vfet-chassis-a","title":"VFET Chassis Type A (US Stock)","description":"\u003cp\u003eExtremely limited number of rare VFET chassis are available in our clearance.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExternal\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWidth: 291mm\u003c\/li\u003e\n\u003cli\u003eHeight: 180mm (feet not installed, bottom of faceplate to top of faceplate)\u003c\/li\u003e\n\u003cli\u003eDepth: 316mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInternal\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWidth: 185mm (approximation; this is a safe minimum)\u003c\/li\u003e\n\u003cli\u003eHeight: 165mm\u003c\/li\u003e\n\u003cli\u003eDepth: 300mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":39292343124041,"sku":"DIY-VFET-A","price":375.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DIY-Audio-Sony-Vfet-3-4-Front-16MP_10a5f29e-ab0b-4f53-964d-1c477b8db16c.jpg?v=1618201088"},{"product_id":"smps-dc-filter-p089zb-kit","title":"SMPS DC Filter P089ZB Kit","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan color=\"#333333\" style=\"color: #333333;\"\u003eThe PO89ZB, an inline DC filter for SMPS wall warts, preamps, HPAs, Korg NuTubes, B1, etc.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis filter is limited to single rail 48V DC, 3A applications.  The kit contains top-quality parts as selected by the circuit’s designer which includes KEMET ESH477M050AH4AA or Nichicon UHW1H471MPD capacitors and top-quality Bournes  inductors RLB0912-2R2ML.  The kit’s PCBs are fabricated using 2oz copper and tinned thru-holes for low noise operation and ease of assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cspan color=\"#333333\" style=\"color: #333333;\"\u003eNote that the kits will use either the Nichicons or Kemets depending on availability as these are often difficult to source. Both are considered the top two choices for low-ESR caps for the circuit and users will be happy using either.\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eNote - Photos include parts available at the time of publishing. Individual components are subject to change based on availability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLinks:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.diyaudio.com\/forums\/analog-line-level\/354213-po89zb-inline-dc-filter-smps-wall-warts-preamps-hpa-korg-nutube-etc.html\"\u003eThe PO89ZB discussion thread on diyAudio\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":39297638465609,"sku":"DIYK-SDFP098ZB","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DIY-Audio-SMPS-Inline-DC-Filter_0039.jpg?v=1618962976"},{"product_id":"aleph-j-mosfet-and-jfet-kit","title":"Aleph J MOSFET and JFET kit","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":39321292931145,"sku":"DIYK-AJ-MFJF","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DIY-Audio-06-2021-AJ-IRFP140plusactives.jpg?v=1625704059"},{"product_id":"matched-jfets","title":"Matched JFETs","description":"\u003ch3\u003eIdss Choices\u003c\/h3\u003e\n\u003cp\u003eOne of the most common questions is what Idss sub-group to choose.  All JFETs are grade B\/BL (6-12mA).  You can select from an Idss sub-range. If you are building any of the First Watt products, Nelson has provided a summary.  Learn more about \u003ca href=\"https:\/\/diyaudiostore.com\/pages\/idss-choice\"\u003ehow to choose the right Idss for your project\u003c\/a\u003e. \u003c\/p\u003e\n\u003ch3\u003eProject use reference\u003c\/h3\u003e\n\u003cp\u003eBelow is a list of JFETs required for some of the most common projects.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eP Channel Quad: \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/power-amplifier\/products\/aleph-j\"\u003eAlephJ\u003c\/a\u003e, \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/pre-amplifier\/products\/burning-amplifier-gain-stage-for-ba-1-ba-2\"\u003eBA1 Gain Stage\u003c\/a\u003e, \u003ca href=\"https:\/\/diyaudiostore.com\/products\/acp-complete-naked-kit\"\u003eACP+\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003eN Channel Quad: \u003cmeta charset=\"utf-8\"\u003e \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/pre-amplifier\/products\/mezmerize-b1-buffer\"\u003eMezmerize\u003c\/a\u003e \u003cmeta charset=\"utf-8\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eNP Quad: \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/power-amplifier\/products\/f-4\"\u003eF4\u003c\/a\u003e \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/power-amplifier\/products\/f-5\"\u003eF5\u003c\/a\u003e \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/power-amplifier\/products\/f-5t\"\u003eF5T V1\/2\/3\u003c\/a\u003e F6 \u003ca href=\"https:\/\/diyaudiostore.com\/collections\/pre-amplifier\/products\/burning-amplifier-gain-stage-for-ba-3\"\u003eBA3 Gain Stage\u003c\/a\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/diyaudiostore.com\/collections\/power-amplifier\/products\/f-5t\"\u003e\u003cspan\u003eF5T V3 Balanced (Qty 2)\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAll matches are guaranteed within \u003cspan\u003e±0.2mA. T\u003c\/span\u003eest conditions are 10V @ 22'C. For more information visit the \u003ca href=\"https:\/\/diyaudiostore.com\/pages\/jfet-matching-information\"\u003eJFET matching information\u003c\/a\u003e page.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eManufacturer specifications: \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/LSK170_2013-06-26.pdf?v=1623052369\"\u003eLSK170\u003c\/a\u003e | \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/LSJ74_2019-07-24.pdf?v=1623052369\"\u003eLSJ74\u003c\/a\u003e | \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/2SK170_2007-11-01.pdf?v=1623052369\"\u003e2SK170\u003c\/a\u003e | \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/2SJ74_2007-11-01.pdf?v=1623052369\"\u003e2SJ74\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eAny letters or numbers printed on Linear Systems JFETs are batch identification and do not reference the grade \/ Idss range. You must test the JFET to determine the Idss \/ grade.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eQuantity Limits\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eN Quads: \u003c\/strong\u003eLimit of 8 units per customer per month \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eP Quads\/NP Quads: \u003c\/strong\u003eLimit of 2 units per customer per month \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNP Octets: \u003c\/strong\u003eLimit of 1 unit per customer per month\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese JFETs are provided as a service to the do-it-yourself audio hobbyist community. They are rare and obsolete. Please only buy what you need. \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eIf you need more than the above quantity for a particular build, please email \u003ca href=\"mailto:contact@diyaudiostore.com\"\u003econtact@diyaudiostore.com\u003c\/a\u003e. \u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Linear Systems LSK170 Quad 6-8mA","offer_id":39335246889033,"sku":"DIYLS-K170BMQX","price":30.0,"currency_code":"USD","in_stock":true},{"title":"Linear Systems LSK170 Quad 8-11mA","offer_id":39335246921801,"sku":"DIYLS-K170BMQY","price":35.0,"currency_code":"USD","in_stock":true},{"title":"Toshiba 2SJ74 Quad 6-8mA","offer_id":39335246954569,"sku":"DIYTO-J74B-MQX","price":45.0,"currency_code":"USD","in_stock":true},{"title":"Toshiba 2SJ74 Quad 8-11mA","offer_id":39335246987337,"sku":"DIYTO-J74B-MQY","price":50.0,"currency_code":"USD","in_stock":true},{"title":"Toshiba 2SK170\/2SJ74 Quad 6-8mA","offer_id":39335247020105,"sku":"DIYTO-NPB-MQX","price":40.0,"currency_code":"USD","in_stock":true},{"title":"Toshiba 2SK170\/2SJ74 Quad 8-11mA","offer_id":39335247052873,"sku":"DIYTO-NPB-MQY","price":45.0,"currency_code":"USD","in_stock":true},{"title":"Toshiba 2SK170\/2SJ74 Octet 6-8mA","offer_id":39335247085641,"sku":"DIYTO-NPB-M8X","price":90.0,"currency_code":"USD","in_stock":true},{"title":"Toshiba 2SK170\/2SJ74 Octet 8-11mA","offer_id":39335247118409,"sku":"DIYTO-NPB-M8Y","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/matched_jfets1-cropped-on-white_1024x1024_a81eeb35-f6e8-4deb-ac33-f4d9a8956a26.jpg?v=1623052805"},{"product_id":"aluminum-handles","title":"Milled Aluminum Handles","description":"\u003cp\u003eMilled aluminum handles are the perfect way to complete the appearance of your chassis.\u003c\/p\u003e\n\u003cp\u003eAll 10mm front panels have pre-drilled pilot holes in the back of them to fit these handles.  All you have to do is drill from the back of the panel to the front, using the pilot hole.  \u003c\/p\u003e\n\u003cp\u003e4mm front panels can also fit these handles, but you'll need to drill your own holes in the panels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2 x Milled Aluminum Handles\u003c\/li\u003e\n\u003cli\u003e8 x M4 x 14mm Screws\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hi-Fi 2000","offers":[{"title":"2U \/ Silver","offer_id":39370281287753,"sku":"D1-1MAN02B","price":27.0,"currency_code":"USD","in_stock":true},{"title":"2U \/ Black","offer_id":39370281320521,"sku":"D1-1MAN02N","price":27.0,"currency_code":"USD","in_stock":true},{"title":"3U \/ Silver","offer_id":39370281353289,"sku":"D1-1MAN03B","price":29.0,"currency_code":"USD","in_stock":true},{"title":"3U \/ Black","offer_id":39370281386057,"sku":"D1-1MAN03N","price":29.0,"currency_code":"USD","in_stock":true},{"title":"4U \/ Silver","offer_id":39370281418825,"sku":"D1-1MAN04B","price":32.0,"currency_code":"USD","in_stock":true},{"title":"4U \/ Black","offer_id":39370281451593,"sku":"D1-1MAN04N","price":32.0,"currency_code":"USD","in_stock":true},{"title":"5U \/ Silver","offer_id":39370281484361,"sku":"D1-1MAN05B","price":34.0,"currency_code":"USD","in_stock":true},{"title":"5U \/ Black","offer_id":39370281517129,"sku":"D1-1MAN05N","price":34.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/silver.jpg?v=1627534152"},{"product_id":"the-complete-linear-audio-library","title":"The Complete Linear Audio Library","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cem data-mce-fragment=\"1\"\u003eThe Complete Linear Audio Library\u003c\/em\u003e\u003cspan data-mce-fragment=\"1\"\u003e, is a must-have for every audiophile passionate about audio engineering, instrumentation, and acoustics. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eCreated in 2010 by world-renowned audio engineer Jan Didden, each\u003c\/span\u003e\u003cem data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eLinear Audio\u003c\/em\u003e\u003cspan data-mce-fragment=\"1\"\u003e \"bookzine\" covers a wide range of essential topics, such as tube amplifiers, solid-state equipment, loudspeaker design, and distortion measurement. With this Expert Collection, you get decades of audio engineering knowledge and insights packed in a single USB stick!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/zNCJMfMT_UA\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch3\u003eThe Library\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003eThe Complete Linear Audio Library\u003c\/em\u003e\u003cspan\u003e is an essential technical resource for professional engineers and serious audio enthusiasts alike. The compact USB stick includes:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAll 14 volumes of\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/linearaudio.net\/\"\u003e\u003cem\u003eLinear Audio\u003c\/em\u003e\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e(from 2010-2017)\u003c\/li\u003e\n\u003cli\u003eMasterclass Video: Jan Didden's five-part video series, \"Feedback in Audio Amplifiers\"\u003c\/li\u003e\n\u003cli\u003ePlus bonus material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 14 volumes are packed with in-depth articles and tutorials from some of world's top audio engineers and innovators. Below is just a sample of what you will find the informative collection, or \u003ca href=\"https:\/\/linearaudio.net\/\"\u003eview the 14 volume chapter details here\u003c\/a\u003e.\u003cbr\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eJan Didden:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\"A Flexible 2\/4\/8 Channel Remote Level Control\", \"Realiser A8,\" and \"Thermal Transient Variation of Power Amp Quiescent Current - Instrumentation and Findings\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouglas Self\u003c\/strong\u003e: \"Self-Improvement for Capacitors\" and \"A Low-Noise Preamplifier with Variable-Frequency Tone Controls\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNelson Pass:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\"Static Induction Transistors,\" \"The Arch Nemesis,\" and \"SIT Nemesis\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGary Galo:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\"RIAA Equalisation for Displacement-Sensitive Phono Cartridges\" and \"An Archival Phono Preamplifier\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStan Curtis:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\"Component-Level Mutual Induction\" and \"Class D - An Audiophile's Dream?\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBurkhard Vogel:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\"A Poor Man's Measurement Amplifier\" and \"Challenging BJT Noise\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHannes Allmaier:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\"The Ins and Outs of Turntable Dynamics\" and \"The High-Octane Phono Preamp\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eJan Didden: The Man Behind Linear Audio\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDidden spent most of his career working for the Netherlands Air Force and NATO, where he specialized in Air Defense and International Cooperative Logistics. As an audio innovator and enthusiast, he has completed numerous DIY projects, publications, and interviews, and he has one patent to his name. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHe launched \u003c\/span\u003e\u003cem\u003eLinear Audio\u003c\/em\u003e\u003cspan\u003e in 2010 to help \"spread technical audio information and knowledge in printed format.\" Today, engineers and audio enthusiasts refer to \u003c\/span\u003e\u003cem\u003eLinear Audio\u003c\/em\u003e\u003cspan\u003e articles, as well as Didden's videos, as they pursue their personal and professional audio-related endeavors. \u003c\/span\u003e\u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":39370454827081,"sku":"DIYLA-LIBRARY","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/the-complete-linear-audio-library_side.png?v=1627554025"},{"product_id":"h2-harmonic-generator","title":"H2 Harmonic Generator","description":"\u003cp\u003eThe Nelson Pass H2 Harmonic Generator, Version 2 is a versatile project. It can be used as the basis for a pre-amplifier and\/or as a wonderful tool to adjust the 2nd Harmonic distortion of a system to taste.\u003c\/p\u003e\n\u003ch4\u003eLinks\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.firstwatt.com\/wp-content\/uploads\/2023\/12\/art_h2.pdf\"\u003e H2 Harmonic Generator\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.firstwatt.com\/wp-content\/uploads\/2024\/01\/art_h2_v1.pdf\"\u003eDIY H2 Harmonic Generator Version 1\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/DIY_PREAMP_H2_V2.pdf?v=1634783160\"\u003eDIY H2 Harmonic Generator Version 2\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca\u003eDiscussion Thread \u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.diyaudio.com\/forums\/pass-labs\/376337-h2-v2-build.html\"\u003eH2 Version 2 build thread\u003c\/a\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":39428749852745,"sku":"DIYK-H2-110","price":12.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DIY-Audio-10-2021-H2v2.jpg?v=1635376643"},{"product_id":"b1-korg-completion-kit","title":"B1K Supplementary Kit","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":39433381183561,"sku":"DIYK-B1C-110","price":109.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DSC0075_1024x1024_116e5161-374c-4cd2-98d2-ec99e0ba06e7.jpg?v=1635239897"},{"product_id":"whammy-pcb","title":"WHAMMY PCB","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":39434481631305,"sku":"DIYP-WHAM-130","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/whammy_pcb_1024x1024_1.jpg?v=1635302036"},{"product_id":"whammy-chassis","title":"WHAMMY Chassis","description":"\u003cp\u003eA custom chassis for the WHAMMY project.\u003c\/p\u003e\n\u003cp\u003ePlease note that the photos show the headphone jack, aluminum knob, and various other parts fitted. These parts are not in the chassis kit, and need to be obtained separately either by purchasing the \u003ca rel=\"noopener\" href=\"https:\/\/diyaudiostore.com\/products\/whammy-core-kit\" target=\"_blank\"\u003eWHAMMY Core Kit\u003c\/a\u003e or using the part references noted below.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDimensions \u003cmeta charset=\"utf-8\"\u003e(HxWxD)\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eInternal: 80x210x230 \u003c\/li\u003e\n\u003cli\u003eExternal: 86x230x243 \u003c\/li\u003e\n\u003cli\u003eFaceplate: 90x24x10\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eMaterials\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eFaceplate: 10mm aluminum\u003c\/li\u003e\n\u003cli\u003eRear: 3mm aluminum\u003c\/li\u003e\n\u003cli\u003eTop cover: 2mm aluminum\u003c\/li\u003e\n\u003cli\u003eBottom cover: 2mm aluminum\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eParts required to complete the exterior and set the correct PCB height\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eRCAs (REAN \u003cmeta charset=\"utf-8\"\u003eNYS367-0, \u003cmeta charset=\"utf-8\"\u003eNYS367-2)\u003c\/li\u003e\n\u003cli\u003eKnob (Parts Express 240-2218)\u003c\/li\u003e\n\u003cli\u003eIEC Filtered PEM (Schurter DD12.9111.111)\u003c\/li\u003e\n\u003cli\u003eHeadphone Jack (Neutrik NMJ6HF-S, optional red nut NRJ-NUT-R)\u003c\/li\u003e\n\u003cli\u003eStandoffs, screws and nuts are Harwin R30-3002502, McMaster Carr 92000A114 and 90695A033 respectively  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":39434481991753,"sku":"DIYHF-WHAMCHAS","price":119.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/Whammy-Chassis_000916MP_b6eecd6d-41b0-42c2-b2fb-40b77dc6a314.jpg?v=1635302293"},{"product_id":"amp-camp-amp-parts-kit","title":"Amp Camp Amp Parts Kit","description":"\u003cp\u003eThis includes a carefully selected assortment of parts to build a complete the Amp Camp Amp. It does not include \u003ca href=\"https:\/\/diyaudiostore.com\/products\/meanwell-24v-5a-psu-with-power-cord\" target=\"_self\"\u003ea power supply\u003c\/a\u003e or chassis. You can also buy \u003ca href=\"https:\/\/diyaudiostore.com\/products\/amp-camp-amp-kit\" target=\"_self\"\u003ethe complete Amp Camp Amp kit\u003c\/a\u003e which has everything included. This kit is offered for those that have their own PSU and chassis.\u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":39678393352265,"sku":"DIYK-ACA-S18-B","price":135.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/Parts_Kit_3bdaafb0-e45a-4920-8bf6-a0d03078db63.jpg?v=1644982439"},{"product_id":"aca-mini-essentials","title":"ACA Mini Essentials Kit","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":40119475601481,"sku":"DIYK-ACAMINESS","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/Essentialscombinedcopy.jpg?v=1659335751"},{"product_id":"aca-mini-completion-kit","title":"ACA Mini Completion Kit","description":"","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":40119545888841,"sku":"DIYK-ACAMINCOM","price":119.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/completion-16mp.jpg?v=1659337906"},{"product_id":"diy-front-end-2022","title":"DIY Front End 2022 Essentials Kit","description":"\u003cp\u003eAmong the appreciations of DIYers is stuff that works \u003cem\u003esimply, well, and cheap,\u003c\/em\u003e not necessarily in that order. \u003c\/p\u003e\n\u003cdiv title=\"Page 1\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp\u003eThis project is an effort to assemble these elements into a discrete gain stage that can be used as the front end for modest power amplifiers or as a general audio gain circuit.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eFor more information including the article PDF itself, please read the \u003ca href=\"https:\/\/www.diyaudio.com\/community\/threads\/diy-front-end-2022.394339\/\" data-mce-href=\"https:\/\/www.diyaudio.com\/community\/threads\/diy-front-end-2022.394339\/\"\u003eDIY Front End 2022\u003c\/a\u003e thread on diyAudio.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's included?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEach kit includes two circuit boards, providing for two channels\u003c\/li\u003e\n\u003cli\u003e12 matched J113 JFETs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2 KSA992 bipolars\u003c\/li\u003e\n\u003cli\u003e4 resistors matched to the JFETs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":44507687256343,"sku":"DIYK-FE-ESS-R2","price":39.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/files\/DIY-Audio-FE-Essentials-Full-Kit-R2.jpg?v=1715476367"},{"product_id":"eq-for-full-range-drivers","title":"Equalizer for Full Range Speakers","description":"\u003cp\u003eAn \u003ca href=\"https:\/\/www.diyaudio.com\/community\/threads\/full-range-eq.399413\/\"\u003eequalizer for full range speakers\u003c\/a\u003e that addresses the common need for a bit of of a bump in the bottom end and a dip in the top.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cem\u003e\"Most of the time full range drivers need a little help on the bottom end, and the bass filter is pretty good at giving them a bump without creating overdrive at frequencies below that. It is also very common to see an upper midrange elevation in full rangers with a decline at the top end, so an adjustable dip in this band is useful.\"\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp\u003e\u003cstrong\u003eFor more information:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003ca href=\"https:\/\/www.diyaudio.com\/community\/threads\/full-range-eq.399413\/\"\u003eFull Range EQ\u003c\/a\u003e thread at diyAudio\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"diyAudio Store","offers":[{"title":"Default Title","offer_id":44507809939735,"sku":"DIYK-EQ4FR-ESS","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/5046\/products\/DIY-EQ-for-FR-Speaker-PCB_Parts_3000px.jpg?v=1679628495"}],"url":"https:\/\/diyaudiostore.com\/collections\/all-products.oembed?page=4","provider":"The diyAudio Store","version":"1.0","type":"link"}