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  • Isolation transformer upgrade for old guitar amps

    If full wave rectification increases the available voltage, can you insert a second 35w4 instead of the diode bridge? This way you can have all tube rectifier, smoother voltage and the tube will eat up the extra voltage produced.I'm asking because I am doing a similar project right now. I managed to get my amp pretty quiet but had to up my filter caps to where the tone became too hard for me. I'd like to be able to go as low as 20uf without the 60hz hum. Right now 50uf is fairly quiet. I used this article to get my power supply set up in the first place. (thanks!)my tubes are 12ba6 12ba6 35c5 35w4. fujiya ex-1 1950's tape recorder,originally.

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