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Philco 66 - Sweet Music at Last!!
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05-01-2012, 01:55 AM
Post: #19
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RE: Philco 66 -Nothing
With -3.3 volts on the 6A7 that tells me the oscillator is OK. Probably getting some capacitive loading from your meter not allowing more than -5 volts.
Does you signal generator have a separate audio output tone? Looks like we are down injecting a signal on the 75 and 42 tubes' G1 grids. |
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