SOLD
Asking $45 $35 to include USA shipping
For sale are 4 boards from Michael Stark, I got on the big auction site. Three were built up, one is bare board. I have the original description of the boards, BOM, and schematics which will ship with the boards. Only parts as soldered and shown in the pictures are included.
I understand there have been concerns about the reliability of these boards, and I was planning to change over the full preamp board, by desoldering and reusing the parts to this design:
https://www.diyaudio.com/community/threads/the-ultimate-tube-preamp-power-supply.389308/
The two filament DC boards were used for 6SN7 tubes for about 100 hours without issues.
The one high/low power board was tested with a tube rectifier supply and filter choke and worked at the testing stage, but was never put in circuit. The other high/low board is bare. There is red enamel on that board over one area of solder mask scuffing.
For sale are 4 boards from Michael Stark, I got on the big auction site. Three were built up, one is bare board. I have the original description of the boards, BOM, and schematics which will ship with the boards. Only parts as soldered and shown in the pictures are included.
I understand there have been concerns about the reliability of these boards, and I was planning to change over the full preamp board, by desoldering and reusing the parts to this design:
https://www.diyaudio.com/community/threads/the-ultimate-tube-preamp-power-supply.389308/
The two filament DC boards were used for 6SN7 tubes for about 100 hours without issues.
The one high/low power board was tested with a tube rectifier supply and filter choke and worked at the testing stage, but was never put in circuit. The other high/low board is bare. There is red enamel on that board over one area of solder mask scuffing.
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