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
Last modified: Thursday 15th September 2022
Chris Cox - chrisc@chris.org