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Just personal opinion: professional Fabrication is WONDERFUL, I would have murdered for it decades ago, but when I am developing and testing something, Protoboard is fine but it is not a real board. So being able to go from artwork-on-a-screen to iron-on Laser to etching to drilling within an...

Congratulations on your build (y) You mention "board damage/destruction" elsewhere, even when using original/"good" chipamps while others (such as Paul Ruby) mention high reliability. But now I see you apparently use a conventional "iron" supply: mains transformer (visible in pictures) >...

As you noticed, supply voltages do not match, *at all*. A voltage converter is technically possible but not practical. Best is to repair original VOX/Silvertone/whatever power amp. IF driver transformer goes bad , not impossible but unlikely, you can rewind it at home, it is not too complicated...