. . . Just use a 12V jumper battery or a friends car and jumper cables to power your CB if you suspect power noise. If your problem doesn't go away then power supply isn't your problem. . . .
Or you can test by powering the CB with your own jeep battery with nothing else connected to the terminals, i.e., the circuit consists of only the battery, two wires and the CB. I suppose one can use a different battery to completely eliminate the possibility that RF interference is being generated by the jeep battery, but I am not aware of any widespread concern that automotive batteries themselves are the cause of RF interference.
I do check new CB's with nothing else hooked up to the battery terminals, but only to check to be sure that the radio powers on and the functions work before I go to the trouble of a full installation. Next time I'll listen for RF interference as well.
But riddle me this, how is powering the radio with nothing else connected to the power supply in order to check for power supply related RF interference really any different than powering it with everything hooked to the terminals, the ignition "off," and nothing turned on?
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