[Icom] 765 TR relay

Wed, 5 Mar 2003 22:02:46 -0500

It could be something external but I tend to think not because my other
radios don't seem to exhibit this using the same antenna connections.
However, strange things happen.  A number of years ago my 80 meter
dipole suddenly developed sky high SWR which could not be corrected by
the tuner.  I had the tuner almost completely apart looking for bad
connections, signs of arcing and the like.  I could find nothing. I
finally went outside and discovered that a squirrel had dined on about
two inches of one side of the ladder line!  I actually caught him coming
back for another course.

Bruce - W8FU

-----Original Message-----
From: Mel Martin (VE2DC) [mailto:[email protected]] 
Sent: Wednesday, March 05, 2003 7:26 AM
To: [email protected]; [email protected]
Subject: [Icom] 765 TR relay

I've also seen this symptom with a bad relay on the tower and once with
a loose connector. Actually that was an memorable lesson. Since
everything seemed OK in the shack, I had assumed that the problem was on
the tower, a 150' guyed monster. So we climbed the tower, checked the
relay box, the many connectors on the tower... Everything was perfect...
It was a connector at ground level, where there was a join between
hardline and RG8 beside the house that had worked loose. Next time...
I'll start from the other end!

I've also seen this with a bad T/R relay, so your diagnosis might be
correct... But be wary of things external also.