On Tue, 2007-03-13 at 16:12 -0500, k8vf_mark@centurytel.net wrote:
> All of a sudden My Omni VI(+1) began acting up.
>
> When turned on from a cold start, the PBT is way off, I must turn it about
> 30 degrees to the Counter Clockwise in ALL MODES.
> After 5 minutes or so it JUMPS to the "normal" setting (rather it is off
> again and I must re center the control to hear as I normally would). It
> doesn't drift, it SUDDENLY reverts to its proper state.
>
> If, for example, you were copying a cw station it would disappear and you
> would have to re-center the station with the control. It works fine until
> turned off and allowed to get cold.
>
> Has anyone seen this one? I searched and didn't find any in the archives.
>
> Since it is in all modes, it should narrow it down some.
>
> Thought I would check before I open it up.
>
> Thanks, Mark
>
Its thermal. Could be an almost soldered connection, a connector, or
inside a chip or transistor.
You need a freeze mist and some warm air (hot air gun or hair dryer).
When it changes go cool a section. Then warm it, doing a binary chop
(cutting the area heated and cooled each time) to isolate it. You may
even get it down to the connection or device with the problem.
73, Jerry, K0CQ
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|