Sorry, I have the same problem with my repeater on a 100 foot tower guyed
with 3/16 cable. It seems when the temp drops below 60 F I get a squeal in the
RX side of my repeater. I can shake the tower when its doing it and it will
go away for a few minutes. We went up and grounded the antenna and bracket to
the tower. I thought we were getting RX noise from a bad connection that
would get worse when the temp dropped due to the metal shrinking. Still no luck
fixing it. I'm not sure what to do now. 73, KD5UZA
In a message dated 3/12/2009 3:39:30 P.M. Central Daylight Time,
paul_n1...@myfairpoint.net writes:
Hi Randy,
I remember working you on 2 meters.
That is very interesting. I tried bonding all the joints. If
anything it actually seemed to make things worse!? I have been
seriously thinking about Phillystran. It's a big expense not knowing
for sure where the problem lies, but the only way to find out may be
to try it and see!
Paul
wb8art wrote:
Hello Paul, Worked you a few times many moons ago. I would
agree with Jeff with tapping and slightly causing movement with
the repeater up with a weak signal. I have before experiened both
an antenna (stationmaster) with internal broken joint which
caused severe noise and desense but also dependent on movement in
the structure. Also have seen with a 100ft. guyed 3/36 town like
yours having the same issue. I tried grounding bonding all
joints on guys to tower and between tower sections to no avail.
Also tried isolating the preforms from tower and bottom supports
with no change. I decided that the 3/16 stranded was the
generation source. We changed the guys to Phillystran and never
had another issue.
**Need a job? Find employment help in your area.
(http://yellowpages.aol.com/search?query=employment_agenciesncid=emlcntusyelp0005)