Hallicrafters SX-101MkIII
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@bingobonkman In fact, the only right way to address fixing this reciever is to replace all of the tubular plastic cased, paper dielectric capacitors.They will all be acting more or less like unstable resistors now, at best. It is a job, but when you are finished and have also replaced any resistors which may have drifted out of tolerance, This receiver will perform beautifully, and make you want to stop listening to your modern ss transceiver, not joking!
bingobonkman 4 weeks ago
Nice SX-101! It is likely the "ground" or common (chassis) side of the af gain control has a cold solder joint, or the pot itself is defective.It's a voltage divider & you seem to have continuity from the high side of the potentiometer through the wiper (center) pin to the following tube but it will not control volume unless the path to chassis gnd is complete. I also suspect a bad stdby switch/connection, but the old tubular, paper-dielectric bypass capacitors are always suspect as well...
bingobonkman 4 weeks ago