[Icom] Article on improving IC-765 AGC/Audio

Thu, 04 Apr 2002 08:53:10 -0700

Hi, Igor
If you did it, you'd like it better. Audio sound quality improves.
Looking at the audio ckt, the cap size is rather small as is.
73,
Tony, VE6CGX

Igor Sokolov wrote:
> 
> I did not do AGC mod. Just like it as it is. But I have PBT mod and CW
> tracking mod. Both are very useful. I use IC765 in every contest. Superb
> radio. Having 3 high power stations in the vicinity of a few hundred meters
> from me in every contest calls for a very good radio with high dynamic range
> and tight filters. IC765 meets all these requirements.
> 
> Igor UA9CDC
> 
> > one cap. change(the audio coupling cap, in the audio amp section).
> > I found out the values does not have to be exact.
> > In my case, I changed the value of R440 to 470 Ohm, C280 to 0.66 mF,
> > C300 to 1.39 mF. Also if your R85 is 10K Ohm, change it to 4.3 K Ohm to
> > increase the sidetone level.
> > That's it.
> > 73,
> > Tony, VE6CGX
> > P.S. My old 765 has all the mod. that I know of. In every day use.
> >
> >
> >
> >
> >
> > [email protected] wrote:
> > >
> > > In the Dec 1995 issue of QST there was a Technical Correspondence
> article
> > > titled, "Modifying the ICOM IC-765 for Better-Sounding Audio and
> Smoother AGC
> > > Performances".
> > >
> > > Anyone here have a copy of that they can share with me?
> > > Tnx!!
> > >
> > > 73,
> > >
> > > Bob K8IA
> > > Michigan USA
> > >
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> Icom FAQ: http://www.qsl.net/icom/