[Elecraft] KAT3 Automatic Antenna Tuner

Phil & Debbie Salas dpsalas at tx.rr.com
Wed Mar 24 11:55:19 EDT 2010


"That sounds like a useful suggestion.  At least it did unitil I thought
about it a while.

Connecting the input of the amp to port 2 is easy but what do I do with the
output. Antenna port 1 is already connected to my antenna switchs. What do I
do with the output from the amp? I could maybe connect both ports 1 and 2 to
the amp input and the amp output to  the switch since only one at a time is
active but what happens when the port in use is sending 100W back into the
unused port? That scares me a little."

I use a MFJ-4726 6x6 switch.  My K3 A antenna output connects directly to 
one of the MFJ-4726 inputs.  My K3 B antenna output goes to my ALS-600 
amplifier, my MFJ-998 autotuner, and a separate MFJ-4726 input.  So I use 
the MFJ-4726 to select between barefoot or amplifier inputs, and direct the 
output to one of three antennas or a dummy load.

Phil - AD5X 



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