Re: NAAFI receiver problem
The 6K7 has a -96 volt bias on it. No signal will pass at that level.
Confirm if R3 is the correct value. If the problem remains you need to pull one of the valves and re-measure the cathode voltage. Repeat the process with the other removed. I would normally expect the cathode voltage to be somewhere between 5 and 10 volts.
Al
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I won't tell you how I discovered that.
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