Can someone please explain why not paying your bills causes the grid and
therefore the clocks to slow down? None of the reports, either for the
technical or lay person, give a reason.
David N1HAC
On 3/8/18 5:00 PM, Pieter-Tjerk de Boer wrote:
Hello all,
Here's my graph of the mains grid phase deviation over the last month, and
for comparison the normal behaviour during the previous year:
https://na01.safelinks.protection.outlook.com/?url=http:%2F%2Fwwwhome.ewi.utwente.nl%2F~ptdeboer%2Fmisc%2Fmains-2018.html&data=02%7C01%7Cdavid.g.mcgaw%40dartmouth.edu%7Cea149d08d4134d49c94908d58552ea8e%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C636561513531276977&sdata=LwRuSvSr0HOkxvFoI26uFxgjAxbFif6ytgxe4U2Q%2BQE%3D&reserved=0
This is measured in Enschede, the Netherlands, by time-stamping every mains
cycle using NTP for reference.
Naturally, the 2018 part of the graph nicely matches the graph Detlef posted.
Regards,
Pieter-Tjerk de Boer (PA3FWM)
On Thu, Mar 08, 2018 at 03:50:42PM +0100, d.schuec...@avm.de wrote:
Hi,
from new years eve until today 00:00 the European Electricity Grid entsoe
lost 16891 sinewaves, nearly 338 seconds. Enclosed you find the sketch of
the development. From March 2 they are going to catch up again, it seems.
I do a record of the grid frequency. My timebase is a TCXO, 0.4ppm off. I
get a frequency value for any single sinewave, precision is 1.4*10^-4 Hz.
Cheers
Detlef Schücker
DD4WV
(See attached file: lostseconds.pdf)
"time-nuts" <time-nuts-boun...@febo.com> schrieb am 08.03.2018 02:16:55:
Von: Gerhard Hoffmann <dk...@arcor.de>
An: time-nuts@febo.com
Datum: 08.03.2018 02:41
Betreff: Re: [time-nuts] Frequency deviations in Europe affect clocks
Gesendet von: "time-nuts" <time-nuts-boun...@febo.com>
Am 07.03.2018 um 22:09 schrieb Poul-Henning Kamp:
This explains why my oven clock and the time/temperature display
on the building outside my apartment in Switzerland are six minutes
slow since January. It was a great mystery to me.
Can you get a picture of this ? It would be wonderful to have for
future discussions...
Does that help?
<
https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.flickr.com%2Fphotos%2F137684711%40N07%2F38870750440%2Fin%2F&data=02%7C01%7Cdavid.g.mcgaw%40dartmouth.edu%7Cea149d08d4134d49c94908d58552ea8e%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C636561513531276977&sdata=tOoi%2BsnXyQjy0%2FGXCyOtOInytUmckrvoKGIO1G%2FRpnE%3D&reserved=0
album-72157662535945536/
>
Input to the counter is just an AC wall wart with a voltage divider to
4Vpp.
Now, the frequency has risen to above 50.02 Hz constantly. It is in the
middle of the night after all.
They have to catch up.
BTW I have decided to build an analog phase noise tester of my own. This
weekend
I did most of the mechanical things, but it is still in a kit state.
The pictures are to the left of the 49 Hz-Pic.
The 1-to-6 coax relays are part of the switchable lambda/4 delay line,
so I can enforce
quadrature everywhere above 5 MHz, including unknown amplifiers etc.
Still looking for 2 more 1:6 relays.
The mixers and dividers are in stereo, so I can do cross correlation in
the 89441A.
One of the mixer/preamp units is open, the ref oscillators will be
MTI-260s on
my oscillator carrier board.
Have a good night,
Gerhard
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