05-06-2020, 07:32 PM
Hi and welcome,
The primary resistance seems good, it wouldn't be anything close to 5000 ohms. I would check the speaker for a rubbing voice coil. At low volume levels it can cause distortion and or garbling sounds.
Some thing else to bear in mind the early model 70's were non avc sets and the power detector circuit does not product the cleanest audio. You may want to listen w/a tracer and see how it sounds @ different volume levels. The "volume control" is a rf and if gain control so as you adjust it it's changing the level of signal going to the detector. It's not adjusting the gain of the audio amp as it is set to a fixed level.
Bad ground connections @ riveted points on the chassis is something else to have a look at.
Happy Hunting!
GL
The primary resistance seems good, it wouldn't be anything close to 5000 ohms. I would check the speaker for a rubbing voice coil. At low volume levels it can cause distortion and or garbling sounds.
Some thing else to bear in mind the early model 70's were non avc sets and the power detector circuit does not product the cleanest audio. You may want to listen w/a tracer and see how it sounds @ different volume levels. The "volume control" is a rf and if gain control so as you adjust it it's changing the level of signal going to the detector. It's not adjusting the gain of the audio amp as it is set to a fixed level.
Bad ground connections @ riveted points on the chassis is something else to have a look at.
Happy Hunting!
GL
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
