B1 Buffer with Korg Triode PCB + Fairchild JFETs
At Burning Amp Festival 2017 Nelson presented a version of a pre-amp using the Korg Nutube dual triode. We now have the latest version of this circuit available in the store complete with Fairchild JFETs and all directly supplied by Nelson Pass.
Please check the following links for more information:
- PCB, Fairchild JFETs and tweaking resistors (all direct from Nelson) for just $25
What's not included:
- The Nutube. You will need to supply your own Nutube, and they are available from the diyAudio Store separately for $49.99.
- All other parts required to make the project
A complete parts kit and chassis are currently in the early planning stages, with no ETA.
The PCBs look really well done and matched JFETs directly from Nelson Pass make this kit unique.
I bought this board because I know that I can TRUST this circuit. I know who participated in this design, so I can be confident. Also, this is not a copy, there are no mistakes, you know that all values are correct and the layout is well done. The board itself is a piece of quality. I would prefer bigger pads, gold contacts and more space, but it's ok. Once the parts are sodered, it is not a good idea to remove and resolder better ones. So choose the parts you love the best from the beginning and keep it that way. It was not difficult to soIder those wonderful 1000uF/25v Silmics. They could not have one more mm diameter. Kaisei woudn't be welcomed here. I'm glad it was possible. I did not hear this buffer yet, because I still have to order the Nutubes, but I believe that it will be even better than the famous "K Buffer" that I like so much. I'll "see" it later! If I can post another feedback, I will write about my listening impressions and if it is better than the KB - for me... I'll send photos too. Thanks to the gentlemen who designed it and allowed us to have it so easily! Francisco
The pcb is of very good quality. The diyAudioshop sent it very fast. Included JFETs are matched very well.
How does it sound? - Beautiful! Absolutely no hum or noise. Open wide soundstage. Interesting possibility
to adjust positive and negative 2nd harmonic. Together with my BA-3 poweramp great.
This little soundmachine is a giant!
Dirk / cubicincher
This preamp looks so tiny - but the sound is giant!
The pcb is of excellent quality, as well the matched JFETs. I would say it is not difficult to build.
Delivery time from diyAudiostore was very fast. Well packed.
How does it sound? - Fantastic! The possibilty to adjust the harmonic profile is a very cool gimmick.
Build it - Test it - Enjoy beautiful music with it!
Plays wonderful with my BA-3 poweramp and others.
I just hooked up to my system, without putting into a chassis yet as I could not wait. The sound is awesome. The lower end of the frequency spectrum is better, more detail and information all around, more clarity, and plenty of power for my speakers. Basically this preAmp brought to live my speakers. This was easy to put together, and when in doubt look at the diyaudio forum for some tips and ideas. Thank you to Nelson Pass for this fantastic hobby and preAmp, 6L6 for guides, and those that helped with list of components at diyaudio. I highly recommend that you build one of these :)
We Also Recommend