[Elecraft] MFJ-4416B Battery Booster RF sensing

[Kenneth Christiansen]

Hi to the group.

I had a good time working field day QRP Battery and made 119 5 watt CW contacts using a solar panel for charging etc.

I plan to go on vacation in about a week and bought a MFJ-4416B battery booster to use with my KX3 and KPA100 in my camper. I see a SO239 jack on the booster that needs some RF to turn the unit on during transmit and off during receive. I tried letting it run during receive but it makes a low level nasty interference on 20 CW. Does anyone have experience feeding RF to that jack? I feel it would be undesirable to have a branch off my feed line that would act as a tuned stub. I feel the RF switching would be desirable but need to know the best way to do it. 

Thanks in advance. And 73

Ken.  W0CZ
w0cz at i29 dot net



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