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Re: [IRCA] recent PEI loggings



Mark:


I''ve never heard of a problem with the WWV transmitter frequency. Whether the received signal is accurate enough to be a standard depends on your idea of what is good enough. Do you only care about being with 1 Hz for MW or do you want .1 Hz at higher SW frequencies? Propagation can sometimes cause Doppler shift. Were you to use the lowest WWV and have Doppler, you might meet 1 Hz at MW or maybe not. Better to use the highest WWV available, avoid sunrise / sunset and then you'll certainly be accurate to 1 Hz at MW and probably SW.


Chuck


________________________________
From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Mark Pettifor <mark@xxxxxxxxxxxxxx>
Sent: Wednesday, November 9, 2016 11:58 AM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] recent PEI loggings

The WWV and WWVH and other standard time frequencies are supposed to be
just that - standards. Q: Are they ALWAYS accurate enough to be used as
standards for calibration? IE, have they ever deviated any from their
standard frequencies? Just curious.

Mark in IN

On 2016-11-09 12:47 pm, Chuck Hutton wrote:
> Well calibrated or not calibrated at all, 4QD will stick out like a
> sore thumb with its odd frequency. It's far enough off frequency to be
> unique.
>
> Chuck


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