I have two r-c clocks in the house and they both keep accurate time. One
clock is made by KLIK, the other by STAIGER - both from ARGOS.
The second-hand moves at the very moment I hear the pip, or as exactly as
the eye can tell. But I do not use Radio 4. Instead I check my times using
the pip sequence from RWM's time service broadcasts on either 4.996 or 9.996
MHz (good signal strengths in UK).
There is a danger with broadcasters these days that their studio source goes
through digital buffering and will be subject to delays. The time difference
between identical broadcasts via analogue circuits and digital circuits is
in the order of two seconds.
BBC time pip accuracy can be checked by listening to them at the same time
as listening to RWM.
Ron
G3SVW
----- Original Message -----
From: "Dr. David Kirkby" <[email protected]>
To: "Discussion of precise time and frequency measurement"
<[email protected]>
Sent: Saturday, June 25, 2011 8:19 PM
Subject: [time-nuts] How accurate are cheap radio controlled clocks?
I've got one of the cheap radio-controlled clocks? I was listing to radio
4 the other day and herd the time signal. The radio controlled clock was
about 3 seconds off. I was a bit surprised it was so far off. I'm just
wondering how accurate these things are.
--
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