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

[Ralph Mowery]

I remember many of the C&J stories.  That was about the time I got interested in electronics.  I was around 10 years old at the time.  I don’t remember that one for some reason, but do remember about 2 stories before that one.   For a while that was the first thing in the magazine I turned to.

 

Where I worked there were many clocks but each area set their own.  As an instrument man I had to set the clocks on about 20 or more pieces of equipment if I was on duty the night of the time change.  We had hundreds of instruments with clocks in them,but  did not bother to set them as the time was not important.    If it was, it would have taken all day or more to set everything in the plant.

 

 

From: greenkeys-bounces at mailman.qth.net [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Nick England
Sent: Tuesday, March 06, 2018 11:53 AM
To: Greenkeys email list
Subject: Re: [GreenKeys] Frequency deviations in Continental Europe including impact on electric clocks steered by frequency

 

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 

 

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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