10-25-2020, 05:16 PM
One of my IF cans has mica disease. The radio sounds great until it heats up after about 20 minutes, then I get nasty static and I can see arcing inside the bottom of the can.
I want to rebuild it. I have watched videos on how to do this but need clarification. Each side of the can has 3 terminals. On a known good can from another radio, the capacitance between the 2 terminal ends on each side measures 3.5pF.
On one side, if I measure the capacitance from an end terminal to the middle, I get 116pF and on other opposite side, if I measure an end terminal to the middle I get 55pF.
So , if I rebuild this thing, I remove the mica, and then, where exactly am I soldering in the replacement capacitors on each side? Should I be using two 3.5pF capacitors and connect the terminal ends on each side or is there something I have to do withe middle terminal as well? In my radio (53-1750), one of the middle terminals on 1 side is not even used.
Thanks,
