Topband: FRONT END PROTECTOR

[Bill and Liz McHugh]

I suppose some people who use full break-in want a complicated solid-state front-end protector.  I don't use break-in and so a simple DPDT relay powered from your transceiver will do the job at almost $0.  One side grounds the auxilliary RX antenna port on the transceiver while the other grounds the RX antenna feedline.  Foolproof, and you always know if it is working since you can hear the relay kick in every time you transmit.

I have been using one of these for many years....ever since my linear developed a mind of its own when RF started feeding back into the transceiver's auxilliary RX port.  I've never had a problem and it protects the front end 100%.  'Course I'm a dinosaur 'cuz I don't use full break-in.....but I suspect there are many like me!!

Bill VE3NH/VE3CSK