airband receiver.
Initially it only displayed this behaviour on one or two channels and it was intermittent. But now it behaves like this permanently, which makes me think that perhaps a component in the crystal oscillator part of the circuit has failed.
When I tune to the fundamental frequency of the crystal on a handheld scanner, there is an oscillation from both sets. But the working set continues to oscillate strongly as I move the scanner several feet or so away from the crystal circuit. The faulty radio oscillates only weakly and stops doing so only a few inches away.
