[TenTec] Omni VI opt 3.... PLL problem

[Jim Goudie]

And thanks again, again!!
Jim  AF3Z

Jim Goudie   —  jagoudie at comcast.net
610 Kraybill Church Rd
Mount Joy, PA 17552

> On Jan 28, 2022, at 1:55 PM, Peter Bertini <radioconnection at gmail.com> wrote:
> 
> Further Notes: To access those crystal slug tuned adjustments you will need
> to lift the aluminum cover.  You can disconnect all of the cables for the
> FM board, and any RF connectors. The exciter board also provides DC
> regulated voltages and must remain connected.  Be very careful when moving
> the cover, allowing the RF driver transistor to hit ground will cause
> component damage!  Be sure to use Fig 4-16 and Fig 4-15 to ensure you are
> using the right adjustment for the band in question!  Be very careful NOT
> to damage the delicate slugs in those coils! Note that on some bands the
> same crystal is used for two bands: ie: Y2 is used for 80 and 20 meters.
> 
> If you adjust the questionable crystal inductor and the problem returns
> when the rig is back together and gets hot then there is a problem with the
> related band crystal(s).  My solution was to remount the two DC regulator
> pass transistors that use the top cover as a heatsink to the rear apron,
> and to cut a 1" wide slot on the cover between the FM and the LL Driver
> board.  That was a rather desperate move on my part on two Omni's, but they
> are still working. I don't suggest you hack your rigs as I did.
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