There's some wrong information being propagated here. Somehow the
failure of frequency comparators and/or frequency standards that were
based on doing a PLL with the CARRIER of the WWVB signal is being
extrapolated to the failure of all Radio Controlled Clocks which do not
track the carrier
There seems to be a lot of misinformation and misunderstanding about how
consumer WWVB consumer clocks and watches sync and what the changes to the
format at WWVB mean to them.
The following which give the details from the horse's mouth
http://www.nist.gov/pml/div688/wwvb-030513.cfm
John, Just read your excellent reply after I had pressed the button to send
mine which covered the same points, though much less eloquently, many thanks.
73
David Anderson GM4JJJ
On 29 Nov 2014, at 08:39, John Marvin jm...@themarvins.org wrote:
There's some wrong information being
I reset my shack clock to local time, CST, yesterday evening and this
morning it is correct to the second (it was running about 45 seconds
fast). Now I'll have to see if it stays in sync over the long term.
73, Nate N0NB
--
The optimist proclaims that we live in the best of all
possible
On 11/29/14 12:57 AM, David Anderson wrote:
I would venture to say that most clocks that have stopped working as well as
they did in the past would be because of an increase in interference levels due
to our modern digital lifestyles and poor enforcement of EMC standards, not the
change of
Unfortunately the consumer clocks seem to attempt to sync between
0200 and 0400 *local* (display) time regardless of the time zone.
I have a couple that would display UTC but when I set them to do
so they never sync because their window does not seem to include
the optimum propagation window.
Another thing to watch out for on these 'atomic clocks' appears to be
nearby lightning strikes. I have 3 of the clocks here. Two are not
affected but the other one, after any fairly nearby thunderstorm,
requires that I remove the battery, let it completely discharge all
energy held within
The battery powered Oregon Scientific clock I tried to sync for about 10
minutes at a half-dozen different times each day. The main reason
appeared to be saving battery power by turning the receiver off.
Mine had an addendum that said they added a check at noon. If the clock
was many hours
I have a long-time close friend who's retired from
the NBS in Boulder and was the project engineer
on the NBS #7 cesium standard. After the recent
reflector postings about WWV / WWVB I thought
I would get first-hand recent information from him.
The GPS satellites all carry on-board cesium
Hi interesting. It appears all Citizen atomic watches purchased recently use
the newer protocol. Mine syncs every night even in a drawer and maintains the
time to 1/4 of a second a day.
How in the world does such a small antenna work at 60 kHz?
On Nov 28, 2014 3:18 PM, Ken G Kopp
Hi Roger!
Yes, you're not the first to spot my error about ND, and my friend is
trying to confirm where the WWVB
LORAN C transmitter came from
I used to do hamfest talks on antennas for 160M and used several slides of
the George, WA station. Last time I was there they had a Bobcat on the
roof
A minor point . . . but I believe that the GPS satellites carry
rubidium standards, not cesium. IIRC, the rubidium standards are much
smaller and lighter and much more suited to satellite use.
At one time I used a cesium standard to troubleshoot a timing issue
when clocking the phone
On 11/28/2014 1:25 PM, dave wrote:
At one time I used a cesium standard to troubleshoot a timing issue when
clocking the phone network. I think it, in its shipping container,
weighed about 75#. The container probably weighed less than 15#. A
cesium standard is fairly heavy. We had to lug it
And it's Lamoure not Lemoure (says the ex-North Dakotan). I actually visited
that site back when I was attending Science Scool in Wahpeton. Racks and racks
of mux's.
Myron WVØH
Printed on Recycled Data
On Nov 28, 2014, at 1:54 PM, Ken G Kopp kengk...@gmail.com wrote:
Hi Roger!
Yes,
Interesting thread. OMEGA was on 10 - 14 or so KHz. There was a
LORAN-C station in Gillette WY, maybe WWVB came from there. I would
imagine converting a 100 KHz transmitter to 60 KHz is a whole lot easier
than 10 KHz to 60 KHz.
Near the end of the LORAN-C era, some of the transmitters were
On Fri, 28 Nov 2014, Ken G Kopp wrote:
...
Here's the most important info as of about a year
ago the modulation scheme on WWVB (60 kHz) was
changed (phase reversal each minute) and this has
rendered most of the end-user equipment inoperative.
Most (all ?) tracking receivers like the
I heard from my time-nerd friends that the modulation scheme changes for
a short period at night to allow a chance for older equipment to sync
up. I don't know that for sure.
Technology Review said there are millions of pieces of equipment that
use the older scheme.
This is indeed
* On 2014 28 Nov 17:41 -0600, Hisashi T Fujinaka wrote:
I heard from my time-nerd friends that the modulation scheme changes for
a short period at night to allow a chance for older equipment to sync
up. I don't know that for sure.
I have an older LaCrosse LCD clock that is my shack unit and
I recieved a new la Crosse clock about two months ago In the
instructions it stated that it would only sync a a specific time at
night.And now I know why.
David Moes
President: Peterborough Amateur Radio Club.
dm...@nexicom.net
VE3DVY, VE3SD
On 11/28/2014 18:40, Hisashi T Fujinaka
On 11/28/2014 1:18 PM, Ken G Kopp wrote:
I have a long-time close friend who's retired from
the NBS in Boulder and was the project engineer
on the NBS #7 cesium standard. After the recent
reflector postings about WWV / WWVB I thought
I would get first-hand recent information from him.
...
On Fri, 28 Nov 2014 19:19:31 -0600, Nate Bargmann wrote:
It's possible that the shack clock is a victim of this change but the
other two were purchased around the same time. One difference is that
the shack clock is set to GMT and the others are set to local time. As
I recall the clocks
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