First I'd put a choke (such as two Palomar balun kits) on the coax as it
enters the rig. This will reduce anything picked up on the outside of the
coax. Next add a tuner in line. Even though your antenna may not require
one the tuned circuits will reduce the signal level. If this doesn't do
enough then put series tuned circuits across the coax inner & shield. One
for each station. They have to take your transmitter power. When adjusted
to the station frequency they will greatly reduce the signal --
Jack, K6NY, Palomar Engineers
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