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-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Brooke Clarke Sent: Thursday, March 01, 2012 11:41 AM To: time-nuts@febo.com 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 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 _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.