Re: Heathkit GC-1000 WWVDO

Hi

Spectracom used to be in the WWVB / OCXO combo business. They had a few that
likely fit the modern definition of disciplined. I don't think anybody ever
did a WWV disciplined unit. The path delay issues are just to crazy.

Back when they were new, NBS / NIST was not very happy about the accuracy
that Heathkit advertised for the WWV receivers. I don't think the design had
a problem as much as the marketing sheets.

Bob

-----Original Message-----
From: time-nuts-bounces@...
[mailto:time-nuts-bounces@...] On
Behalf Of Brooke Clarke
Sent: Thursday, March 01, 2012 11:41 AM
To: time-nuts@...
Subject: [time-nuts] Heathkit GC-1000 WWVDO

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