[TenTec] Omni D drift problem

Bwana Bob wb2vuf at gti.net
Sun Jan 11 11:51:36 EST 2009


Gil:

All Ten Tec PTO's have a temperature compensation capacitor. On the 
schematic it is shown as "value selected in production". Some selections 
were better than others. It may be an N750 type (negative 750 ppm per 
degree C) with a value of 10 or 15 pf. Make sure this capacitor is 
present.  Depending on which direction the PTO is drifting, you may need 
to go higher or lower in value. Unfortunately, I haven't found a good 
source for N750 capacitors, since everything is digital these days.

				73,

				Bob WB2VUF

g p wrote:
> My Omni D-B drifts about an hour after first turned on, any ideas what to look for?
>  
> Gil n2wjw
> 
> 
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