Shishido 12BH7 Push-Pull Amplifier:


This minature push-pull amplifier is based on a design by Nobu Shishido presented in his Transmitting Tube Amplifier book. -

The design of the amplifer is fairly straight forward, and this amplifier sounds way better than it should!

The final amp used output transformers from a Fisher 500c, and a power transformer from a console amplifier. A good use for old PP iron if you have any lying around!

I can't read a single word of the text in the book, but the schematic looked pretty cute. It uses a single 12AU7 and a pair of 12BH7's in PP parallel for each channel. If anyone would like to translate the chapter I'll gladly send along a copy!

Here's the bare PC board in the prototype stage

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