1940s Westinghouse AM/FM Radio Model H-1821

[Electronic M]

Have you tried injecting audio yet? That test divides the possible problems in half at least. Since it is a series string radio plug it into an isolation transformer or use a battery-powered signal source for injection.

[vortalexfan]

Originally Posted by Electronic M

Have you tried injecting audio yet? That test divides the possible problems in half at least. Since it is a series string radio plug it into an isolation transformer or use a battery-powered signal source for injection.

No I haven't yet. I don't even know what I would use as a sound source to inject sound into the radio.