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Silver mica disease is an issue with many radios. Thanks to this forum, I now know how much time I wasted looking for cold solder joints, junking some otherwise good radios out of frustration.
1960 GE T155 Musaphonic table radio - 6" speaker sounds super, excellent reception with 6 tubes. Volume drops intermittently with crackles. Tapping on the RF amp coupling transformer seemed as if a solder joint was cold but none were found.
Per the Sams schematic, 110 and 100 pf caps are molded into the terminal bases of all three RF-IF cans in this radio. These things fail mechanically and cause major static. I will post a photo of the surgical removal of this failed cap and tucking a new one neatly into the can, soldered to the terminals across the coil.
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