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RE: what's up with my RH amp

Hey, you built a cool amp and you're not gonna show us pics??


Anyway, try this -

With the amp running, put a low voltage 60hz signal into the input, like .5V or something... If you don't have a signal generator, then you could make an ersatz source by using voltage dividing resistors and the filament supply.

Now use your meter on the AC setting to see where the signal dies. Does it appear at the input to the inverter? The output of the inverter? The grids of the power tubes? etc....

Rule out large sections of the circuit all at once. Measure each point with and without test signal applied, to rule out bad readings.

Did you miss a ground?

My guess is that if you don't hear crackling from the speakers as you probe around, your output stage isn't working.



Edits: 12/09/14 12/09/14 12/09/14

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