Hi Tom:
Seeing the mention of "Waltham" reminded me that I just posted a video
of a Waltham 8-Day clock running at:
http://www.prc68.com/I/8day.html
in UV light with a piezo contact microphone.
Also a 1 sec time exposure.
Have Fun,
Brooke Clarke
http://www.PRC68.com
Thomas A Frank wrote:
On Dec 24, 2010, at 12:00 PM, Michael Poulos wrote:
We all enjoy good accurate time keeping. :) What is your favorite watch? My
watch (so far) is a Casio WaveCeptor digital watch that gets the WWVB signal
and calibrates itself that I bought for $50 at a WalMart - the price of one
Chicago parking ticket. Less than half a second off at any time, it is plenty
accurate. The one exact drawback is that during night driving, you can't read
it when you need to check the time. The lesser drawback is that it is not
dressy.
A nice "dressy" radio controlled watch would be that Citizen EcoDrive watch shown on
those adverts during football games. If it has glow in the dark hands and 5 minute markers it would
be great if expensive. So, let's have it with the best watch for a time nut! (not including Tom van
Baak's REAL "atomic watch")
I would suggest that the best watch for a time-nut is either the long out of
production Synchronar, or one of the NIXIE tube watches that are presently
being made (by list members, I think).
Unlike most quartz watches that utilize a 32768 Hz crystal, the Synchronar
operates up around 700 kHz. One of the built in functions is the ability to
adjust the divider in steps of 8 seconds per year to fine tune the timing.
Mine has consistently been within 4 seconds over the course of a year for the
last 20ish years (since the third year I had it, as I spent the first two
adjusting it).
Sadly, they are rather uncommon and expensive when you find one...so much so
that I rarely wear mine. In its stead, a YES (by Wild Seed) is my usual watch.
Not terribly accurate (it runs a good 5-10 seconds per month fast), but it
does a wonderful job of displaying sunrise, sunset, moon rise, moon set, and
moon phase. I've accepted the somewhat reduced accuracy for that capability.
Would I be expelled from the club if I admitted my dress watch was a Waltham
pocket watch made in 1864 (not a typo), and that I was very happy with its 5-10
second per day accuracy? I should be quite pleased if I work as well when I'm
156 years old.
Tom Frank
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