Had basically the same problem with w GE MASTR II repeater on VHF HI. The
issue was with the repeater transmitter. When the repeater sat quiet for a
while then it was keyed up the transmitter would have many spurs that would
slowly travel up the band. This affected other repeaters that were open
Brett,
How did you determine it's an IM product?
What repeater/controller combination are you using? I'd try powering down the
controller and manually keying the transmitter. If that solves it, it could be
the controller's reference oscillator or divider outputs leaking onto the PTT
line or
Bret, you might have your PA going in to oscillation creating the spurs due to
a highly
reactive duplexer.
We had a similar problem here many years ago and fixed it with a simple tuner
on the TX
similar ot the GE Z matcher . The one that we used was Home Brew.
When the tuner was adjusted for
Brett,
Some additional information will be helpful. What makes/models of equipment
are in your repeater? Are all jumper cables and the antenna feedline
double-shielded? Are any of the connectors nickel-plated? Are there any
barrels or adapters in your jumpers? Is there an isolator/circulator
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