[Elecraft] MFJ-4416B Battery Booster RF sensing

[Bill Frantz]

I have a N8XJK boost regulator which has RF switching like your 
booster. I use a UHF "T" connector -- 2 female and 1 male. I 
connect the male plug directly to the booster and then use coax 
jumpers to connect the radio and the antenna. That way the stub 
is so short that it doesn't have a noticeable effect on the 
antenna match.

73 Bill AE6JV

On 6/26/16 at 7:51 PM, w0cz at i29.net (Kenneth Christiansen) wrote:

>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.

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