10-09-2026, 12:54 PM
Hi Roy,
https://philcoradio.com/library/download...l.%201.pdf
Welcome to Phorum. I'm not real familiar with the 96 (link to schematic above) but I may help by getting started in the right direction. First, you haven't given us an idea of any work you have completed, like replacing components. That's always helpful. Getting to your problem, I can see that the high negative voltage on the triode grid has cut off the triode resulting in the distortion. What's confusing is why it changes so drastically when tuning a station. Maybe this is the detector action. We could expect to see some change in relation to signal strength but this seems extreme.
This could possibly be caused by an out-of-tolerance resistor or a bad ground connection on a component. Check part 15 for resistance end-to-end. Brighter minds can chime in with additional assistance.
https://philcoradio.com/library/download...l.%201.pdf
Welcome to Phorum. I'm not real familiar with the 96 (link to schematic above) but I may help by getting started in the right direction. First, you haven't given us an idea of any work you have completed, like replacing components. That's always helpful. Getting to your problem, I can see that the high negative voltage on the triode grid has cut off the triode resulting in the distortion. What's confusing is why it changes so drastically when tuning a station. Maybe this is the detector action. We could expect to see some change in relation to signal strength but this seems extreme.
This could possibly be caused by an out-of-tolerance resistor or a bad ground connection on a component. Check part 15 for resistance end-to-end. Brighter minds can chime in with additional assistance.
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