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For Sale unfinished project: mini tube amp with DC-DC step up converter

Things you have for sale.
Hey! I'm selling off projects that, due to situation, I can't finish. 20 EUR + shipping from Lithuania

I have: a sturdy metal case with two sockets for 9-pin tubes, a ready-made boost converter board, a jack, and a potentiometer.
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I planned to build a low-power amplifier running on low voltage (12V). I can recommend a circuit, or you can choose one yourself.