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RE: 65uF capacitor?




If you connect the 65uF capacitor as shown, it's going to be effectively in parallel with the output transformer... this is BAD, it's going to kill the high frequency response of the amplifier. Old radios would put a much smaller value cap in this location to roll off the highs.. I can't honestly believe it even works with it connected as shown.

If you connected it instead to the other end of the output transformer primary (the high voltage supply, as opposed to the plate of the 2A3), this would properly bypass the cathode bias resistor of the 2A3.

I assume the attached image is what you meant to do, right?


Edits: 02/21/17 02/21/17
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