Good evening, our club has a Wacom WP-639 four can duplexer as part of our
repeater system. Input Fq is 147.915 and Output Fq is 147.315. We have a
600kHz (+) offset. Very simply, our main problem is when we run the
transmitter at full power 100 watts, there is a HUGE desense on the receive
side of things. When we drop the transmitter power level to around 20-50
watts, the receive side opens WAY up to a large area where people can get into
the repeater. As we begin to bring up the transmitter power, "white noise"
begins to appear and the receive side starts to desense again. All the cables
have been switched to double sheilded cables and all the same wavelength in
length. We have the duplexer seperated & sheilded from the transmitter &
preamp parts. We have not replaced the antenna feed coax with double sheilded
coax yet. Antenna is a Hustler G7 atop a 55' mast. The duplexer was retuned
just over 1 year ago. Any suggestions as to what we could look into next? Some
of us believe the problem is with the tuning of the duplexer receive cans.
Thank you very much.
