[Icom] IC751A caps mod

Wed, 30 Oct 2002 08:59:22 -0500

Daniel,
One little trick I have employed over the years to make the 751 continue on
without changing the caps is to just get in the VCO can with a plastic
tuning stick and adjust the caps left and right to find the new range due to
the change in value of the cap and then set it about in the middle of the
range.  The result is the rigs works just fine for at least another 6 or
more months.  After that, it may need anther touch up.
All you need is to be somewhere in the range of required voltage for the VCO
and the radio will work normally.
Bruce K1XR

----- Original Message -----
From: "Daniel I. Nieto" <[email protected]>
To: <[email protected]>
Cc: <[email protected]>
Sent: Wednesday, October 30, 2002 8:33 AM
Subject: [Icom] IC751A caps mod

> I am about to do the famous repair for replacing the caps in the radio due
to garbled sound on LSB sometimes, until radio settles down and becomes
usefull.
> I just got the trimmers, caps & resistors from Icom in order to undertake
the repair but before doing so, given the fact is not a small undertaking, I
was wondering if anybody has done such repair and had some word of advice
for me in doing so.
> What concerns me most is changing the plastic trimmers inside the metal
case PLL and have the radio work afterwards, since I do not know how to
adjust those new trimmers. Is there a bird's eye view to go about this?.
> Any suggestion/recommendation regarding this or other issue in  my 751A
repair, will be greatly appreciated, given the fact I am on the side of the
world and service for old radios is not easy to come by, oddly enough, you
can get any kind of new stuff & technology repaired.
> I have been living with this problem for a while now, always waiting for
the radio to settle down before using it, but it is becoming worse and very
annoying so I just have to do the Icom suggested fix I found on their site,
very common for these radios as I learned afterwards. Other than that, I am
very happy with my radio and would never think of selling it.
> Best regards to all from the other side of the world.
> Daniel Nieto.
> CE3HRX
>
>
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