[Hallicrafters] FPM-300 Drift

[DALE PARFITT]

 > Message: 1
> Date: Fri, 30 May 2008 14:18:54 -0700 (PDT)
> From: ted orant <ted1970 at sbcglobal.net>
> Subject: [Hallicrafters] fpm300
> To: hallicrafters at mailman.qth.net
> Message-ID: <419002.8664.qm at web80707.mail.mud.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> I posted a question weeks ago with no response. Im trying again. The 
> recieve and transmit drift alittle.Any ideas? I really would appreciate 
> any sugguestions. Thank you.
>
 Hi Ted,
You may want to try one of the Huff&Puff VFO stabilizers. I think the best 
by far is made in the U.K. by Cambria Designs as it uses a PIC for 
housekeeping chores.
Also make certain the VFO tracking capacitor has not deteriorated and 
causing VFO problems.

In the end, it's a very mediocre VFO design. I have a Galaxy  solid state 
VFO of the same era that drifts less than 30Hz from cold start.
Dale W4OP