[time-nuts] Heathkit GC-1000 WWVDO

Chris Albertson albertson.chris at gmail.com
Thu Mar 1 17:36:55 UTC 2012

Does an NTP server using WWV as a reference clock count as a WWVDO?
If so then there are likely a few of them around.

I have a really nice RF front from an old WWV receiver that I want to
get working.  Well it does work but I'm using a general coverage
reciever to convert the IF to audio, need to replace that.   I also
have a  c-max wwvb receiver.  The goal is to run them as NTP reference
clocks.   I know they are not as good as GPS but the point to to
measure the delay and hopefully learn something about ionosphere from
the delay.

But both of these are looking at the data streams.  Maybe better to
look at the carrier and lock an XO to that?

On Thu, Mar 1, 2012 at 8:41 AM, Brooke Clarke <brooke at pacific.net> wrote:
> Hi:
> Has anyone done stability plots on the Heathkit GC-1000?  Although it's a
> clock good to 0.1 seconds, it's also a WWV disciplined oscillator (WWVDO).
> The linear power supply makes use of a 7805 and so heats up the enclosure
> which is hard on the electrolytic caps but also acts as a crystal heater.
> On the other hand installing a switching power supply like the PT5101 will
> cool the enclosure but may degrade the stability of the oscillator.
> Are there any WWVB disciplined oscillators (WWVBDO)?
> http://www.prc68.com/I/HeathkitGC1000.shtml
> http://www.prc68.com/I/Loop.shtml
> --
> Have Fun,
> Brooke Clarke
> http://www.PRC68.com
> http://www.end2partygovernment.com/Brooke4Congress.html
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Chris Albertson
Redondo Beach, California

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