[Icom] Strange IC-765 40 meter problem

[Tony Hwang]

Hi,
Do you have dummy load?
Something on 40m BPF might be acting up.
73,
Tony, VE6CGX
P.S. I have aging beaten up 765 also. Still works fine.

Joe Stepansky wrote:
> 
> 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
> 
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