[ICOM] IC-725 PLL Problem

[Tim Moes]

Hi Dave,

 Depends if the unit is unlocked on all frequency's or if it is just
partially unlocked. Most of Icom PLL units used a trimmer capacitor that
after they have aged fail and need to be replaced with a higher quality
ceramic trimmer. This failure usually causes a range of freq to either
warble or lose tx and rx. The IC-725/726 also has the DDS Loop that drifts
and there is a coil (L30)that has to be adjusted by spreading the turns of a
coil to the correct voltage at 14.12650MHZ.
Let me know if this helps out or more detail on how it is unlocking.

TNX.... Tim   wd0fkc
Tim Moes  wd0fkc
www-midwest-technical.com
----- Original Message -----
From: "Dave Noon" <va3dn at execulink.com>
To: <icom at mailman.qth.net>
Sent: Wednesday, August 10, 2005 7:25 PM
Subject: [ICOM] IC-725 PLL Problem


> Can anyone tell me how to fix the IC-725 "PLL Problem".
>
> Thanks
>
> Dave  VA3DN
>
>
> Amateur Radio VA3DN
> va3dn at execulink.com
>
>
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