[ICOM] 765 freq problem

[D C _Mac_ Macdonald]

The IC-735 and other rigs of that vintage had similar problems with VCO trimmers.  Receive AND transmit audio would get "gargley."
 
Fred in the Dallas area fixed my 735. 
 
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* k2gkk hotmail com * 
* Oklahoma City, OK * 
* USAF & FAA (Ret.) * 
* * * * * * * * * * * 
 

 
> From: gfiber at comcast.net
> To: icom at mailman.qth.net
> Date: Wed, 25 Feb 2015 17:52:36 -0800
> Subject: Re: [ICOM] 765 freq problem
> 
> For some reason the link does not work, but typing in Icom IC0765 problems
> into Google brings it right up as the 1st link. The FAQ also mentions the
> BFO trimmers being an issue with drift. Here is the link again this time not
> from my iPad but a desktop. http://www.qsl.net/icom/oldicomfaq/ic-765.html
> 
> Gary K8IZ
> 
> -----Original Message-----
> From: Icom [mailto:icom-bounces at mailman.qth.net] On Behalf Of Marc & Tricia
> Niebergall
> Sent: Wednesday, February 25, 2015 11:16 AM
> To: ICOM Reflector
> Subject: Re: [ICOM] 765 freq problem
> 
> Gary,
> Thanks for the link. Will research thoroughly.
> 
> Marc
> On Feb 25, 2015 11:11 AM, "Gary Fiber" <gfiber at comcast.net> wrote:
> 
> > Can't remember if the reference causes any issues, is it 30.72 MHZ? If 
> > some might be a trimmer cap causing the problem. There is a listing on 
> > www.qsl.net/Icom/oldicomfaq/Ic-765.html you should look at. This was 
> > written by the main 765 tech at the time when he worked at Icom America.
> > See if any of the symptoms he lists match your issues. This tech moved 
> > on years ago but he took the time to list the more common issues with 
> > the transceiver, which helped us out in the support department
> tremendously.
> >
> > Gary P. Fiber K8IZ
> >
> >
> >
> > > On Feb 25, 2015, at 10:42 AM, Marc & Tricia Niebergall <
> > mtniebs at gmail.com> wrote:
> > >
> > > This may have been discussed in past threads, but I could not find 
> > > it,
> > so:
> > >
> > > My 765 drifts off freq by approximately 150 hz.  This happens in a 
> > > matter of a few seconds. It will sometimes drift back. This affects 
> > > both tx and
> > rx
> > > alike. I have been told it is likely in the reference oscillator.  
> > > Does anyone have any experience with this phenomenon?  If so can you 
> > > point me
> > in
> > > the right direction for troubleshooting?
> > >
> > > Thanks,
> > > Marc- k7wxk
> > > ----