Quote:
Originally Posted by ORAWA01
I think the fault seems in the power supply, which I would replace it with battery power. If it goes well, it might be operational rather quickly.
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I assume you are referring to a Wellgood clone about to be revived with 2N3866? Remember that the two transistors should be matched for gain and then balanced when installed to take equal current. Although the board is intended to to take 12V (and around 120mA) I find that it begins to work at about 3V, and certainly shows no advantage above ~5V, at which point the current is appreciably lower and the 3866 appreciably cooler. They will need heatsinks if run at 12V.
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