[time-nuts] Western Electric O-451A/U double-oven XO

[paul swed]

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 <eric at scace.org> wrote:

>
> > On 2016 Apr 26, at 16:25 , paul swed <paulswedb at gmail.com> 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 -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>