Re: [IRCA] frequency measurement accuracy

["Chuck Hutton" <charlesh3@xxxxxxx>]

And - assuming you are using Spectran - the soundcard oscillator may be the
culprit.

Chuck

-----Original Message-----
From: irca-bounces@xxxxxxxxxxxxxxxx [mailto:irca-bounces@xxxxxxxxxxxxxxxx]
On Behalf Of Russ Edmunds
Sent: Saturday, September 02, 2006 10:45 AM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] frequency measurement accuracy



--- Bill Harms <wharms@xxxxxxxxxxxxxx> wrote:

> Well, I am measuring the frequency of WWV.  Something is drifting at 
> a rate just less than 0.1 hertz per minute.  That amounts to about 5 
> to 6 hertz per hour.  Something is drastically wrong here.  I have 
> had my radio on for almost all day since late last night.
> 

It only amounts to that if the drift is all in one direction. While
something in the receiver is possible, line power variations can't be
ignored.

Russ


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