It's not a commercial unit. As it says at [1]http://www.maxmcarter.com/rubidium/index.php, " Almost 30 years ago, I built a receiver for WWVB roughly based on a Don Lancaster design." Apparently this refers to an old article, " Don Lancaster, Experimenting with WWVB, Radio Electronics, August/September 1973". David
On 9/26/12 10:11 AM, paul swed wrote: Thats what I was reading. But have to say I have never seen a commercial divider chain that could be changed. The spectracoms divide to 20 Khz and mult by 3. So would like to see that circuit. Regards Paul On Wed, Sep 26, 2012 at 10:00 AM, David McGaw <[2]n1...@alum.dartmouth.org> wrote: As I read it, the feedback divider was reprogrammed. David On 9/26/12 9:49 AM, paul swed wrote: Also curious on the rcvrs doubling to 120 KHz another multiplier or did the rcvr happen to have a way to change that frequency? The note says that the rcvr local carrier doubled. Regards Paul On Wed, Sep 26, 2012 at 9:18 AM, J. Forster <[3]j...@quikus.com> wrote: Have you actually tried it and gotten it working, except possibly in a very strong signal area? -John ================ Hi, From: "Bob Camp" <[4]li...@rtty.us> A tuned antenna probably is going to provide all the selectivity you'd need. Another possibility is to modify your old circuit like that: [5]http://www.maxmcarter.com/rubidium/2012_mod/index.html Bye, Jean-Louis _______________________________________________ time-nuts mailing list -- [6]time-nuts@febo.com To unsubscribe, go to [7]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [8]time-nuts@febo.com To unsubscribe, go to [9]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [10]time-nuts@febo.com To unsubscribe, go to [11]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [12]time-nuts@febo.com To unsubscribe, go to [13]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. http://www.maxmcarter.com/rubidium/index.php 2. mailto:n1...@alum.dartmouth.org 3. mailto:j...@quikus.com 4. mailto:li...@rtty.us 5. http://www.maxmcarter.com/rubidium/2012_mod/index.html 6. mailto:time-nuts@febo.com 7. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts 8. mailto:time-nuts@febo.com 9. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts 10. mailto:time-nuts@febo.com 11. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts 12. mailto:time-nuts@febo.com 13. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ 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.