[Tgace459]

I was at my bench last night working on a replacement loop antenna on a GE 107. I was getting along OK till I noticed that even with the loop detached that the speaker was emitting a crackle/static. I'd tap the speaker and it would stop. Eventually the radio stopped playing stations altogether.

Now, the speaker only makes a faint hiss regardless of volume settings (his does get louder with volume increase). When I adjust the volume I get sporadic bursts of static and the pilot light dims. When testing pin voltages the speaker crackles (the voltages all look good). When I touched the volume pot with my multimeter I get static....

Any suggestions? Speaker shot (it still makes noise)? Audio transformer? Volume pot? Oscillator coil...mine has 4 terminals and 3 have continuity between themselves while the fourth has no continuity to the other three. I don't know if that's right. Something else?

[Tgace459]

Well...the flickering with the volume control was figured out. Bad ground connection. That's fixed but still nothing but low hum and static from speaker.

[Eliot Ness]

The easiest thing to do first is check the tubes by swapping them out.  You might also want to double check for other bad connections;  look the chassis over very carefully and re-solder any point that might be suspect.

[Tgace459]

Figured it out. The tuning cap padder stuck in a bad spot. Some cleaning revived it.