Motorola Moxy

The Moxy is a two-channel crystal controlled VHF (136 - 174 MHz) / UHF (450 - 512 MHz) transceiver. Or at least, the PCB accommodates crystals for two channels, my set doesn't have a switch to select the second set of crystals.

The main PCB can be populated with an RF transistor, or like mine the power amp can be a separate module which provides a higher power output. For the VHF models, low is 15 W and high is 25 W. The 15 W VHF models are limited to 150.8 - 174 MHz while the 25 W models cover 136 - 174 MHz -- but not in the same model. There are three (two for 15 W) different capacitor sets for the tuned circuits, and depending on how your Moxy was put together this will determine the actual operating frequency.

I've had my VHF 25 W Moxy for ages, got hold of the service manuals and had crystals made for 144.625 MHz, intending to use it as a packet radio (at the time it was a good choice of radio, there's a connector on the back with microphone, speaker and PTT.

Rx frequency = Rx crystal * 3 + 10.7
Tx frequency = Tx crystal * 9


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