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Re: [TenTec] Omni D drift problem

To: n2wjw@yahoo.com, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Omni D drift problem
From: Bwana Bob <wb2vuf@gti.net>
Reply-to: wb2vuf@arrl.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 11 Jan 2009 11:51:36 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
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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