It turns out that watch timing machines are available that
sense the watch crystal both ways. The same was true in
the days of the Accutron tuning fork watch... thought the
more reliable timing machines used a loop to sense the
magnetic field of the drive coils.
The big problem is most such watches no longer use trimmer
capacitors to adjust the timing, but rather store counter
values in a tiny bit of flash ram... absent the manufacturer's
blessing, and a bit of equipment they sell to their authorized
service centers, you probably won't be adjusting the watch's
timing constants.
-Chuck Harris
Bob Camp wrote:
Hi
A watch module is *very* low power. There's not much EM field running
around. What there is relates to many things going on, not just the crystal.
It's *much* easier to pick up the acoustic signal and use it to drive a
counter.
Bob
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azelio Boriani
Sent: Thursday, September 13, 2012 4:45 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RE; New Wrist watch
OK, listening to the 32KHz EM field, not to the acoustic 32KHz.
On Thu, Sep 13, 2012 at 8:08 PM, Ron Frazier (TImeN) <
timenutsl...@techstarship.com> wrote:
My watch is also digital, but I wanted to put a word in for my Casio.
It's the G-Shock MT-G, module 2638. Auto sets, auto charges, 200 M water
resist if I ever need it. I love it. It was around $ 100. I live in GA
in the USA. It sets very reliably but can only receive the signal well
enough in the middle of the night. It's only ever missed one or two
setting times. I've had it since January 2012. I don't know how it
handles time zone changes. I would probably have to look in the manual to
figure out how to tell it.
Ron
On 9/13/2012 12:23 PM, Bob Camp wrote:
Hi
The WV-58A at $28 takes care of the time zone thing pretty well. It's
also
cheap enough to be a throw away if it's damaged. Since it's pure digital,
it's really not going to meet the "I need a second hand" requirement...
Bob
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Christopher Quarksnow
Sent: Wednesday, September 12, 2012 5:39 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] RE; New Wrist watch
There are many Wave Ceptor LCD versions such as WVM120J-1 (about $27) or
WV59A-1AV (about $49) that might not have the spin issue.....
Chris
On Sun, Sep 9, 2012 at 4:34 PM, Robert Darlington
<rdarling...@gmail.com>wrote:
The waveceptor's are okay but I can't wear mine much because I tend to
cross timezones a lot. The hands only run in one direction so when
going to the west, it has to spin 11 hours forward. This takes 20
minutes. I guess it's one way to kill time on an airplane.
-Bob
On Sun, Sep 9, 2012 at 1:12 PM, Rich and Marcia Putz<rp...@bnin.net>
wrote:
I have a $49 Casio Wave Ceptor, white face black numerals, analog hands
including second hand, date, alarm and WWVB syncing in the middle of the
night. Only had to replace the battery once and it ticks are closer than
I
can discern when comparing to WWV @ 10or 15 Mhz.
Rich, W9ENG
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--
(To whom it may concern. My email address has changed. Replying to
former
messages prior to 03/31/12 with my personal address will go to the wrong
address. Please send all personal correspondence to the new address.)
(PS - If you email me and don't get a quick response, don't be concerned.
I get about 300 emails per day from alternate energy mailing lists and
such. I don't always see new messages very quickly. If you need a
reply and have not heard from me in 1 - 2 weeks, send your message again.)
Ron Frazier
timekeepingdude AT techstarship.com
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