[ICOM] re: audio problems

[D & M Pendergast]

Hello Hart,

There have been a few replies to your initial question, all of which haven't
really explained the situation to you.  I will make an attempt.

All the IC-751(A)'s have capacitors used in manufacture in the PLL section
that deteriorate over time, the only solution to it is replacement.  It is a
common fix for these transceivers that probably most of us that own them
have had to do at one time or another.  It may affect all bands or only
some.  In my case, all bands from 30 metres upwards sounded like Donald Duck
and on CW mode I thought someone had a wood saw running somewhere.

I can't tell you the details or how to go about the repair as I returned
mine to
Icom and had them do the work plus a few other service items on the rig all
at the same time.

It is an issue that someone released a service update about as I remember
seeing the same in the past.  Also bad capacitors appear on some frequency
display boards as well - there has also been service information release
relating to this.
Just one of the signs of age but by no means 'past it'


Hope this helps explain why the rig is behaving the way it does.

Best 73, Des - VK3DMP.


----- Original Message -----
From: "Hart Engel" <va3kis at hotmail.com>
To: <icom at mailman.qth.net>
Sent: Thursday, November 04, 2004 1:01 PM
Subject: RE: [ICOM] re: audio problems


> Update number 3. The problem with the 100w output was found. When the
> compressor button was de-pressed the power output went to 100w. I found by
> adjusting the pod in the RF comp circuit I got full power output when I
> pressed the compressor button. That's one head-ache gone. But i have
noticed
> that some stations come in clear while others are distorted or wobbly
> sounding.
>
> ----Original Message Follows----
> From: "Hart Engel" <va3kis at hotmail.com>
> Reply-To: ICOM Reflector <icom at mailman.qth.net>
> To: icom at mailman.qth.net
> Subject: [ICOM] re: audio problems
> Date: Wed, 03 Nov 2004 19:51:50 -0500
>
> This is an update. Now its not just the audio that I'm having problems
with
> its the power output has now dropped from 100w to 10w with the rf gain set
> to high. Bad caps and trimmers? If so, how do I go about fixing this
> problem? and were are they all located?
>
> Hart
>
>
> ----
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>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
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>