[Icom] Strange IC-765 40 meter problem

[Paul Playford]

Before I went into the 765 I would check the antenna.  I have had many,
many, problems with my 765 but Joe's symptom screams antenna.  I would even
go so far as to hang a dipole with it's own feedline as a test.

de Paul, W8AEF

> > For brief background, I began noticing something interesting with my
> > IC-765's performance on 40 meters earlier this year.  The receive level
> > would occasionally reduce considerably and suddenly (i.e. one second the
> > band sounds normal, the next it's severely attenuated).  After hitting
the
> > keyer, even briefly, everything returned to normal.  I noticed this
> > happened more in windy conditions than not, so assumed it was my 40
meter
> > beam.  Also noticed that sometimes the SWR would go up to 3:1, then back
to
> > a more normal 1.4:1.
> >
> > Decided to replace the balun and coax on the beam.  Also checked
everything
> > else out while we were up there.  All looked fine.  Came back down,
fired
> > things up, had a 1.2:1 SWR.  Stations sounded fine.  Then the receive
> > problem kicked in again, and the SWR is now > 3:1!!
> >
> > Is it possible this is something with the 765??  Has anyone seen or
heard
> > of this happening?  It's so bad that even the antenna tuner won't knock
the
> > SWR down.  I don't have another rig to test it with, so now I'm
> > stumped.  But we've replaced virtually everything that can be replaced
on
> > the 40 meter beam, so I'm now out of ideas.
> >
> > Any suggestions will be more than welcome.
> >
> > 73, Joe KQ3F
> >
> > ----
> > Your Moderator: Dick Flanagan W6OLD, icom-owner@mailman.qth.net
> > Icom FAQ: http://www.qsl.net/icom/