Rob Won't work they are phase tracking receivers and wwvb introduced bpsk modulation. Thats why they do not work. Search time-nuts for d-psk-r and you see the various approaches I have used to make those types of clocks useful. Sorry no kits just answers. Regards Paul WB8TSL
On Fri, Apr 29, 2016 at 7:12 PM, Rob Seaman <[email protected]> wrote: > Howdy, > > We’re in the process of upgrading our telescopes in various ways, > including deploying spiffy new GNSS clocks. While rummaging around the > shelves of old equipment, I came across the WWVB time code generators that > had been retired themselves a dozen years ago or more (in favor of NTP > and/or GPS equipment). These are Kinemetrics/Truetime model 60-dc. They > appears to power up ok to the point of displaying the colons and flickering > keep-alive LEDs (see p.51 of http://www.to-way.com/tf/60dc.pdf). It would > be cool to bring them back to life, if only to serve as retro wall clocks. > > It turns out the old 60 KHz antenna (same manufacturer, model A-60FS) was > still mounted on the building, but I wasn’t able to get either of the two > devices to lock when connected to it. The antenna had been repaired at some > point, so I have no confidence that it's still in working condition after > many years out in the weather after the case had been opened. > > Now I’ve come across this notice from Spectracom: > > > http://spectracom.com/sites/default/files/document-files/Pending%20Changes%20in%20the%20WWVB%20Radio%20Signal%20Affects%20Precision%20Frequency%20and%20Timing%20Reference.pdf > > which suggests that other vendors’ devices might also "no longer operate > as intended as a result of the WWVB signal change” after July 2012. > > If so, bummer! > > If not, suggestions for acquiring a functioning antenna? > > Many thanks for any information on these or similar devices. I should note > that another telescope elsewhere on the mountain appears to still be using > a Datum model 9100 (via Forth software!) nightly (though with WWV, not > WWVB?)* Does anybody have a manual for that unit? > > Rob Seaman > University of Arizona > — > * there were even some IRIG wall clocks > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
