[time-nuts] RE; New Wrist watch

Bob Camp lists at rtty.us
Thu Sep 13 22:37:32 UTC 2012


Hi

A magnetically driven tuning fork is a *very* different beast than a modern watch crystal….

Bob

On Sep 13, 2012, at 6:15 PM, Chuck Harris <cfharris at erols.com> wrote:

> 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-bounces at febo.com [mailto:time-nuts-bounces at 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) <
>> timenutslist at 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-bounces at febo.com [mailto:time-nuts-bounces at 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
>>>> <rdarlington at 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<rputz at 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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>>>>> 
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>>>> 
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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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