Admiral 30A15 restoration

[bandersen]

Now what about the issues I encountered in my 30A12 ? This set has them too - weak audio and the IF traps don't peak. Also the 5U4 flashes over on power up.

I replaced the exposed mica caps in the IF cans. That help increase the sound and the coils now peak.


There are also power resistors lurking inside some IF cans that tend to drift upwards.


I added a CL-90 thermistor in series with the main power transformer primary to reduce the surge through the 5U4 rectifier on power up.