SMPS DC Filter P089ZB Kit
- 1 x PCB
- R1, R3: 0.04R or 0.05R 5% 1W precision current sense resistors, LS 12mm
- R2, R4: 953ohm 1% 0.25W resistor
- C1, C2: 470 uF 50V capacitor, LS 5mm and Diam 10mm
- L1, L2: 2.2uH 7.5A 0.10R inductor, LS 5mm and Diam 9mm
- D1: 68V Unidir TVS 600W, DO-204 pkg
The PO89ZB, an inline DC filter for SMPS wall warts, preamps, HPAs, Korg NuTubes, B1, etc.
This 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.
Note 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.
Note - Photos include parts available at the time of publishing. Individual components are subject to change based on availability.
Links:
Just what I needed. It eliminated all hum and hiss from NuTube harmonic generator board so I could use standard wall wart for 12VDC power. Its small size allowed it to be mounted in a wooden cigar box that I mounted the NuTube in.
DIY store was great to work with when the USPS lost it in the mail the first try.
Thanks to the excellent filter my FE2022 build is exceptionally quiet, which enhances its ability to capture fine details, N + THD < -90dB with 48V SMPS.
Many thanks to Mark and diyStore.
Beautiful little kit. The sound of the B1 Korg is more detailed.
Sounds great with NuTube preamp and Purifi Eval1.
& it works great.
Kind of funny that I missed that part, but the packaging was great parts are sealed and on time.