Hi, I dont know about other counties but the oad shedding is certainly still dont this way in the UK, BUT the incremental frequency adjectments are corrected for the mean daily frequency to be correvt at 06:00 in the morning.... so that all the clocks read correctly and we get to work on time!! Despite quartzz clocks I think this is still the case....it is probably enshrined in law in the UK. Also Our nominal voltage is 240v not the 230v decreed by the EU fortunately we can still be fed 240v within the tolarance allows otherwise my toaster would take forever. There is actually a considerable difference in the light output of a tungsten bulb over that range maybe that is why we are being forced into using "polluting" CFBs...nutting to do with time ...sorry pardon Great site Tom !! Alan G3NYK
. ----- Original Message ----- From: "Sylvain RICHARD" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Friday, February 01, 2008 12:25 AM Subject: Re: [time-nuts] Clock Powers of Ten michael taylor a écrit : On Jan 31, 2008 5:27 PM, Sylvain RICHARD [1]<[EMAIL PROTECTED]> wrote: Re the mains frequency, I believe it changes with the load on the grid. Do you have a record of this? I forget the reasoning for frequency variation, but it is load or source related I believe. Part of the reason it It is a balance between production and grid load. In the European case, the grids are phase synchronous over several countries. The (oldish) data I have is - Nordel : Finland, Norway, Sweden, Denmark - Uktsoa : UK. - Atsoi : Irland - Ucte : everybody else in Western Europe : Portugal, Spain, France, Netherlands, Belgium, Luxembourg, Germany, Switzerland, Austria, Italy, Czech Republic, Slovakia, Poland, Hungary, Romania, ex-Yougoslavia During the 2006 blackout, the frequency went down by several hertz before some customers were disconnected ("load shedding"). The so familiar 50Hz line on VLF spectrograms took a dip. A project for a easy to build AC frequency measuring device: [2]<http://www.sparetimegizmos.com/Hardware/AC_Monitor.htm> I could log the frequency deviations from my local AC mains if you want some sample data. This gadget looks nice, but I think I'll pass. Good night Sylvain References 1. mailto:[EMAIL PROTECTED] 2. http://www.sparetimegizmos.com/Hardware/AC_Monitor.htm _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.