Eric The long time constant to deal with the old single phase shift per hour will not help to deal with the 180 degree phase shift per second. Search time-nuts for d-psk-r and wwvb bpsk. That should help you. Regards Paul WB8TSL
On Tue, Apr 26, 2016 at 5:02 PM, Eric Scace <[email protected]> wrote: > > > On 2016 Apr 26, at 16:25 , paul swed <[email protected]> wrote: > > > > Tom, > > Thanks for sharing the photos. > > > > Comments > > It looks like most of the items will clean up very well with a bit of > TLC. > > Agree. That won’t be hard. Mostly sawdust from cellar storage at my > parents’ home. > > > Tom it may be you actually who wrote about the clock and getting it > working. > > Either way I am pretty sure Eric can find helpful details before he > applies > > power. > > The mystery unit is the double-oven XO in the bottom unit. We (my > father and I) have had that operational and did a year’s worth of phase > comparisons with WWVB back around 1980. Unfortunately I haven’t found the > chart recorder strips from those runs. But I don’t expect any problems to > get the equipment operational again with a cleaning and re-capping. > > > The same goes for most of the rest of the gear. The old caps may have a > > nasty surprise waiting. > > > Eric the WWVB receiver will no longer work with the new WWVB modulation > > format. I assume it was a typical TRF radio of the 1960-70s vintage. > > Ha! This was a home-brew from scratch by my father in 1979. (He got the > bug when I brought home the DOCXO and HP-113BR. Working at NBS/NIST also > helped.) But yes, it doesn’t pay any attention to the modern modulation > format. The receiver/comparator’s goal was to establish a “clean” 60 kHz > signal that was phase-locked to WWVB with some moderate time constant short > enough to easily detect the intentional phase shift of WWVB’s signal at the > time — and then perform the comparator task against local sources and drive > a chart recorder with the results. If folks are interested, I’ll post his > “as built” photos and circuit diagram when I unpack the documentation. > > Sadly, since the start of this year my father has been existing in a > dementia wing at a graduated living facility. Restoring this equipment to > service in my home is an emotional homage to the man who taught me so much > about practical electronics. Thanks, Dad — I miss you. > > > > _______________________________________________ > 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.
