[GreenKeys] Frequency deviations in Continental Europe including impact on electric clocks steered by frequency

[Nick England]

Carl and Jerry tackle the Master Clock Mystery
http://www.rfcafe.com/references/popular-electronics/carl-jerry-crazy-clock-caper-october-1960-popular-electronics.htm

Nick
<http://www.navy-radio.com>

On 3/6/2018 7:09 AM, Bob kb8tq wrote:

> Hi
>>>
>>> Most schools / factories / train systems, even back in the 1950’s ran on
>>> a “master clock”
>>> system rather than a bunch of independent clocks. The issue was not so
>>> much line
>>> frequency as a power outage. Going around to a bazillion clocks to
>>> re-set them all to the
>>> correct time cost a lot of money.
>>>
>>> Back when I was in school (yes school had been invented that far back)
>>> the ham radio club
>>> guys noticed that WWV and the wall clock had an interesting
>>> relationship. The wall clock
>>> drifted during the day and between 4 and 5 pm went faster (or I suppose
>>> slower) to eventually
>>> match up with WWV by 5 pm. The largest deviation that I recall seeing
>>> was around 30 seconds.
>>>
>>> Bob
>>>
>>
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