I'm surprised Vlad is seeing as much as six seconds differential but maybe I don't understand the experiment. I've done measurements of the line frequency here in California and never seen much variation.
Jeremy On Fri, Dec 15, 2017 at 9:02 AM Vlad <[email protected]> wrote: > > > I have one of my project boxes, which monitor the main freq. Here is > graph which reflect the time difference between of RTC (based on number > of pulses from OCXO) and the "MAIN TIME" which is based on number of > zero-cross events. > The observation period is 486 hours. > > > > > On 2017-12-14 23:13, Jim Harman wrote: > > On Thu, Dec 14, 2017 at 10:53 PM, Bob kb8tq <[email protected]> wrote: > > > >> > >> > >> Of course this *assumes* an electronic approach. Given that it’s > >> moving > >> pretty slow and you > >> only are looking at fractions of a millisecond, one *could* do an > >> electro > >> mechanical design …... > >> > >> Bob > >> > >> There is interesting background on power grid frequency/time > >> adjustment > > procedures here > > > https://en.wikipedia.org/wiki/Utility_frequency#Time_error_correction_(TEC) > > > > and here > > https://en.wikipedia.org/wiki/Electric_clock#Accuracy > > -- > WBW, > > V.P._______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. -- Sent from my iPad 4. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
