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/diy/ - Do It Yourself

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>> No.1696462 [View]
File: 22 KB, 577x407, 12au7 with 12v supply.png [View same] [iqdb] [saucenao] [google]
1696462

>>1696417
>looks like there's a boost converter near the jacks to power the tube,
https://sites.google.com/site/danampvalveamps/amplifiers/diy-low-voltage

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