A clock that uses an NMEA stream for its display will be a few hundred
milliseconds slow, dependent on the chosen data products and serial baud
rate, as NMEA gives the time of the previous second mark.
David N1HAC
On 12/27/20 9:54 AM, Andy Talbot wrote:
I've just had a look around the house, and actually have four MSF clocks
and an old wristwatch minus its strap (antenna is a small ferrite rod
inside). Forgot I had an old Junghans one as well - that is sitting out in
the shed as it requires a stronger signal than the more modern ones, and
seems to get better reception out there. It's the only one that shows MSF
outages as it updates every hour - and the battery seems to last forever!
I never checked to see how close that is to GPS; if they implement proper
timing or just a simple delay bodge.
Andy
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On Sun, 27 Dec 2020 at 14:02, Peter Vince <petervince1...@gmail.com> wrote:
Hello Andy,
I have an old Maplin digital LCD clock for MSF, and that is always
about a second slow, but the Coopers analogue clocks are MUCH closer, as is
the Junghens DCF digital LCD clock. But the Junghens DCF clock always
misses one or other of the DST changes!
Peter
On Sun, 27 Dec 2020 at 12:11, Andy Talbot <andy.g4...@gmail.com> wrote:
With this talk of Radio Controlled clocks...
I have three domestic RC clocks here, receiving the UK 60kHz signal, MSF.
However, I notice that when compared against a GPS clock, timed from
the
1 PPS signal & NMEA output, they all are a few hundred milliseconds fast,
ie the display changes just before the GPS derived time.
...
...
I only ever have digital display clocks, so wouldn't know if the same
happens with round ones with hands. Anyone else using domestic MSF or
DCF77 clocks who have observed this?
Andy
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