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

[Duncan Brown]

I remember that one!! (now that you have reminded me of it)

Duncan
K2OEQ

On 06-Mar-18 11:52, Nick England wrote:
> 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
>
>
>
>
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
>
> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus