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How about the voltages on the 2 audio output tubes... (The type 41s) These are 6 pin tubes and the pins are numbered with the two larger diameter pins as the "key"... the large pins are #1 & #6. These are the heater pins, and should have about 6.3 VAC between them. Pins 2 are the plates, and should have about 175VDC on them (on both tubes) measured to chassis ground. Pins 3 are G2 and each tube should be around 175 v as well. Pins 4 are the grids of each tube and should be negative voltage. You should hear a louder click in the speaker when you touch pins 2 with the probe, as the tube should amplify the signal.
jr
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