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capacitors are the number one thing in new or esp. old equitment that fail ,they can become leaky ,shorted,open,change value,become resisted ,they can cause intermitent problems, can cause unfiltered voltage's or in blocking aplacation's to damage semiconductor's or electron tube's . the old can type multi side electrolytic dry up ,are internaly leaky ,most of the time they are in a open condition. the same with the wax paper caps they failed back in day on regular base's heat & wax dont mix , im not a fan of reforming either if its bad replace it ,to say you have never had to replace a cap before or your grandpa doesnt like giving out parts when the set works ,is kinda a mystery.
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