Hi The real question is weather the BPSK will help us get significantly better accuracy out of WWVB or not. If it does, time marches on. If not - total waste of effort.
DSP based low frequency receivers are pretty easy to make. You still will need those antennas and preamps to make them work though. If I can get Loran-C type accuracy out of WWVB with the new modulation, I'll certainly build or buy a receiver. Bob On Jul 5, 2012, at 5:43 PM, J. Forster wrote: >> Hi: >> This is so frustrating! > > Agreed. > >> Who makes cheap clocks? CHINA. >> >> Who uses phase comparison? DOD, American Colleges and Universities, >> Laboratories, Astronomers, American Private Industry, Time Nuts, ETC. > > Not really. They have all drunk the GPS Kool-Aid. > > To allow a second source for a standard of time interval, carries the > implication that GPS is not invulnerable. If that's true, people may > wonder what else needs a backup, like navigation? Electric grid > synchronization? Phones? > >> What is our government doing? > > One man, one vote, (one time?). There are a lot more cheap Chinese > 'Atomic' clocks sold every day than timing receivers sold in a year. > Numbers count. > >> They appear to be the best friend Chinese manufacturers ever had! > > Certainly true, in The Donald's view. The US government plays checkers, > the Chinese and Japanese play Chess... to steal an analogy. > > US companies, driven by Wall Street quarter-over-quarter greed, think > about the next quarter; Asian companies think about the next few decades. > > The switch to HDTV was supposed to be a giant stimulus for the US > electronics industry, hence a US 'standard'. How did that work out? What > fraction of HDTVs are US made? > > YMMV, > > -John > > ============== > >> >> Ron >> >> -----Original Message----- >> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >> Behalf Of J. Forster >> Sent: Thursday, July 05, 2012 10:29 AM >> To: Discussion of precise time and frequency measurement >> Subject: Re: [time-nuts] HP 117/10509a... >> >> The only ones that will work are very recent designs. >> >> The HP 117 and Fluke 207 will not work. >> Many Spectracoms will not work. A few will. See their web site >> The Stanford 620 will not, I believe. Some models may. >> >> I posted a partial list some time ago. >> >> Apparently, NIST is working on a receiver and possibly a retrofit. When >> it >> will be available and how much it will cost is TBD. >> >> I suspect the 'retrofit' will be the receiver with a 60 kHz output >> added, >> nothing more, but don't know. >> >> Seems to me, we are down to one egg in one basket. :(( >> >> -John >> >> ================ >> >> >> >>> Dear Group, >>> >>> This thread just saved me from a prospective purchase of an HP 117. >>> >>> Now the big question. Which instruments in general will be affected by >>> the BPSK transition? I have been reading about Kinemetrics 60DC WWVB >>> receiver and clock. It appeals to me if I find one. Will other WWVB >>> instruments not designed specifically for phase comparisons be >>> affected for the WWVB signal modulation changes? Which kind of >>> instruments and interactions with WWVB should I avoid? >>> >>> Thank you. Your comments are surely welcome. >>> >>> Regards, >>> >>> >>> Edgardo Molina >>> Dirección IPTEL >>> >>> www.iptel.net.mx > > > > _______________________________________________ > 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.