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    AR-13A Heathkit Schematic

    Hi, I'm also looking for a schematic for the AR-13A and have been very unsuccessful. I am tracing back what seems to be a 60Hz hum that is evident on all bands. The loudness of the hum is loudest on FM, next on AM and least on the Aux 1 and 2. I'm looking to recap the unit but am unsure of...
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