Equipment Modifications and Useful Circuits

This page contains a few modifications to amateur radio equipment. Any modifications that you perform are at your own risk.

IC-746 cotton-wool controlled crystal oscillator

Simple, zero voltage drop reverse polarity protection for 12Vdc powered equipment.

New style Down East Microwave 144 to 28MHz Transverter - Channel 11 Broadcast Television Audio interference.

Converting an AM-6154 to 222MHz

IC202 receiver improvements

Andy Talbot, G4JNT's, 12v to 28vdc microwave relay driver

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Last modified: Thursday 15th September 2022

Chris Cox -