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Old 15th Jan 2019, 10:04 am   #37
Station X
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Default Re: Trio 9R-59D receiver problems.

While you're at it check the voltage on V8 pin 1 the control grid. The DC voltage here should be close to zero.

ISTR that my own set was showing a positive voltage here as a result of the audio coupling capacitor from the previous stage being electrically leaky.

Please note that neither of the voltages we've discussed are likely to have anything to do with the level of mains hum. We're just checking for correct operation of the output stage.
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