Anybody feel like discussing Old Mopar/Motorola hybrid AM radios?
The only thing I see notable about the way the tubes are used is that they have more or less full voltage to the plate because there must be some voltage drop to couple the signal to the next stage, but there are no resistances in the cathode circuit to create bias in the tube. It just runs as much current as you get with 10 volts on the plate, which is very little.
I think I have Model 204.
Mine has an occaisional "pop" as capacitor C11, a .01 mfd cap has developed leakage.
Now I know what I'll need to do.
Bill, what are the symptoms in yours?
Do you hear a low "thud" in the speaker when turning the radio on/off?
You should.