[time-nuts] webcam app to watch for and time stamp changes

Jim Lux jimlux at earthlink.net
Sun Mar 3 12:16:13 EST 2013

On 3/3/13 9:12 AM, EB4APL wrote:
> When LCD wristwatches became common in the seventies we, in the
> frequency and timing group of a space tracking facility, investigated
> the possibility of adjusting our new watches against our standard.
> We found that a a small copper plate, about 1 X 2 cm, resting against
> the display and connected to a scope probe was able to pick up enough 32
> KHz energy to be displayed in the scope.  Then connected the vertical
> output to an HP 5245L counter referenced to our standard and set the
> gate time to 10 seconds and got the frequency.  We learned that the
> watch had to be worn in order to operate at the right temperature, the
> body acting as an oven, so you has to wear it backside in order to
> access the trimmer (yes, at that time those watches had and adjusting
> trimmer, maybe heritage from the mechanical ones, laser trimming arrived
> later).
> Our group became very popular and busy adjusting every watch our
> colleagues bought to a few seconds per month.

yes.. adjusting your watch to a Hydrogen Maser.. there's a time-nut-y 

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