[email protected] wrote:
Hi Kevin,
The desense is a staticy reception of "weaker" signals( ie an HT at 25
miles) It had gotten worse as it started to affect strong signals too.
If the transmitter was turned off, the repeater could hear just fine.
Problem is intermittent and often followed a rainy day. We replaced
"EVERYTHING" A UHF repeater on the same tower is unaffected. At this
point we think the "new" antenna is failing. Tower sections have been
bonded grounds improved etc etc
To know whether or not the problem is the antenna system, do a
desensitization test directly at the antenna port of the duplexer using
a good load and a lossy tee or other acceptable method like a coupler
slug installed into the Bird Watt meter. If you don't know how to
perform a desense test, there are several articles on the website that
will assist you.
If this proves good, then you have more work to do on the outside.
Let us know...
Kevin
