[time-nuts] WWVB Clocks don't sync anymore (revisited)

Chuck Harris cfharris at erols.com
Wed Mar 20 11:22:46 EDT 2013

The thing is, many of us on the opposite end of the country
from WWVB have to rely on favorable propagation to make our
clocks work reliably.  What happens if noon and midnight
aren't favorable times?

-Chuck Harris

Herbert Poetzl wrote:
> On Wed, Mar 20, 2013 at 02:34:19AM -0400, Bill S wrote:
>> Interestingly, I have three timepieces that will no longer
>> synch to wwvb.Two Radio Shack digital clocks and a Casio
>> wristwatch that I've worn for a couple of years and was always
>> pretty much dead on. Like Paul, I have an analog Lacrosse clock
>> that is running correctly. Nothing I've tried will make the
>> other clocks synch.
> Maybe this is related to the phase modulation time code
> protocol used by WWVB since October 29th, 2012.
> Their website also states that clocks using information
> from the carrier will no longer work, and that during the
> transition period (at least March 21st 2013), the PM
> signal will be turned for for 30 minutes twice a day
> (noon and midnight MST) so maybe check if the clocks
> sync then?

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