and that magic timing machine was the vibrograph, more abot it here:
https://www.google.com/search?q=vibrographclient=firefox-ahs=Kyhrls=org.mozilla:en-US:officialchannel=nptbm=ischtbo=usource=univsa=Xei=iK6RVeX4FJTUoASf2KeIBQved=0CB4QsAQbiw=1024bih=507
we had one
73
KJ6UHN
On 6/29/2015 12:16
-0400
To: time-nuts@febo.com
Subject: Re: [time-nuts] Casio Watches 13 Year Drift in Seattle
Hi
Just to clarify:
In the “art” the watches all ran fast rather than slow. They *would* have
run slow if the
room temperature / skin temperature delta was an issue. Since they did not,
one
A friend of mine is the test engineer/clock guru for one of the major
manufacturers of clock chips. Rest assured that all watch makers know the
usage profiles for their customers quite well and they do indeed tweak the chip
to compensate for the typical profile. If your usage pattern does
If this was normal back at the turn of the 20th century, why wouldn't
Casio, and others at least do as well? Especially now that all
electronic watches have a microprocessor built in... complete with
temperature sensing diodes, battery monitors, and other nifty gadgets.
I am
Hi Andy,
I think you would be guessing wrongly.
The vast majority of watch owners don't want to ever have to set,
wind, adjust the calendar, or in anyway think, or fiddle with
their watch's time. They want it to just be right. In other
words, their disinterest makes them the anti-time-nut.
Hi
On Jun 29, 2015, at 6:03 PM, Andy ai.egrps...@gmail.com wrote:
If this was normal back at the turn of the 20th century, why wouldn't
Casio, and others at least do as well? Especially now that all
electronic watches have a microprocessor built in... complete with
temperature
Hi
Even back in the 1970’s we used computing counters to read the 32 KHz. You
get 7 digits in about 10 ms these days. It will take you longer to power up the
module and stabilize it than the frequency reading takes.
The semiconductor process for the watch chips has always been a bit odd. They
Measuring a 32kHz frequency to ~100 PPB accuracy takes some time, even for
ATE. Time is money.
I didn't think the hardware to do the computations and the digital offset
was any problem. I thought the temperature and voltage sensors might be,
since they are analog. But you can integrate them
Date: Sun, 28 Jun 2015 20:41:15 -0400
To: time-nuts@febo.com
Subject: Re: [time-nuts] Casio Watches 13 Year Drift in Seattle
Hi
Just to clarify:
In the “art” the watches all ran fast rather than slow. They *would* have run
slow if the
room temperature / skin temperature delta
Back in the day when mechanical escapement pocket watches, and wrist
watches were state of the art, the jeweler would adjust the watch to
run at a normal rate, and give them a daily wind. Everything looked
nice in the display case.
When a customer bought a watch, the jeweler would set the watch
Hi
Just to clarify:
In the “art” the watches all ran fast rather than slow. They *would* have run
slow if the
room temperature / skin temperature delta was an issue. Since they did not, one
assumes
that Casio digitally compensates this model (and probably all their watches).
The typical
I think there may be a new Time-Nut in the Seattle area, , ,
https://www.youtube.com/watch?v=hwOMUhS8gV0
John, KM6QX
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