[time-nuts] Is a crystal likely to change frequency by 3% ?
herbert3 at centurytel.net
Sat Sep 13 10:10:57 EDT 2014
Interesting topic! Of course I no longer wear a watch since such a habit
after advancing well into retirement seems pointless but I did want to point
out that perhaps you could include the Bulova Accutron in your studies.
Long ago I fell on ice and landed on my wrist with the result that my space
model accutron never ran again . But a year ago I asked my wife where it
was and she produced it which was then entrusted to a local horologist who
studied it and said he couldn't get the parts to repair it. But after he
had "examined it" I found that it did, indeed, start running again--for a
time. But then it stopped and I gave up since others skilled in the art
simply wanted more for a repair than I wanted to give. But I will still
admit that from time to time a watch is a good thing and I find that the
seven dollar models I can buy today keep time much better than the old
Accutron ever did!
----- Original Message -----
From: "Alexander Pummer" <alexpcs at ieee.org>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Saturday, September 13, 2014 6:44 AM
Subject: Re: [time-nuts] Is a crystal likely to change frequency by 3% ?
> there is only one magnet, which drives the fastest moving arm -- the
> pointer for the seconds -- the other arms are connected via gears, by the
> way that case with the weak periodically recovering battery is an observed
> one, I connected a paper chart recorder to the clock and recorded the
> battery voltage change and the driver pulses of the magnet -- the recorder
> was not able to follow the individual pulses, but the envelope
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