05-15-2026, 03:31 PM
If you try to make voltage measurements is performance restored just from touching?
Sorry for being a broken record but if you install a Radio / Aux switch you can try an external input to at least determine if the issue is Audio, power or the "radio" RF, Mixer, IF, Detector, AVC. I have a Zenith chassis from a 6S27 / 6S52. That schematic shows the mod needed to add a "Radio / Phono Switch". This mod was common back in the day and if done with period parts, does not detract from the value of the set, IMHO.
You also said that if you touch the grid cap of the 6A8, the signal gets louder. Does it stay loud when you let go?
Maybe you have some funkiness in the AVC circuit.
Sorry for being a broken record but if you install a Radio / Aux switch you can try an external input to at least determine if the issue is Audio, power or the "radio" RF, Mixer, IF, Detector, AVC. I have a Zenith chassis from a 6S27 / 6S52. That schematic shows the mod needed to add a "Radio / Phono Switch". This mod was common back in the day and if done with period parts, does not detract from the value of the set, IMHO.
You also said that if you touch the grid cap of the 6A8, the signal gets louder. Does it stay loud when you let go?
Maybe you have some funkiness in the AVC circuit.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55
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