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  1. M

    Cobra 148 GTL (1994 Malaysia) Audio hum in transmit

    So I've done my best to get this radio back to specs, it was my fathers and I do wish to keep it. The unit transmits just fine"ish" and receives amazing but has a hum during transmission (no hum on the PA output). I've tried multiple power sources, battery, and different power supplies. 1...