Motorola GM300 RX Crystal Crystals 44.645Mhz For Two Way Radio

Is your GM300 deaf?

If the receiver hears nothing, even a very strong signal, it could be due to a defective second oscillator crystal on the RF board.

To quickly verify the oscillator is working, tune to its frequency on a nearby receiver; you should hear a solid signal. If not, the second oscillator crystal is most likely bad. This is a common problem on GM300s