David, Harlow asked:
I have two radio-controlled speaking clocks that are identical but one’s two year’s older than the other. They speak at different times. Why is that?
We're actually not sure about this one!
Most radio-controlled clocks update themselves once a day, but cann't do so if they can't receive a strong enough radio signal. It's possible that one of the clocks has a weaker antenna, and so isn't receiving a signal, and has fallen out of time.
Please let us know if you can think of any other reason for this!
I assume the clocks are in different rooms, if this is so, then possibly the signal is being lost as it goes through the extra walls...or if the second radio is in a room near an outside(metal) garage, this may interfere with the signal!!! paul.fr, Tue, 4th Dec 2007
He could always do the experiment, swap the clocks around and see if this changes which clock speaks first. This would give plenty of information, no matter what the result was. paul.fr, Tue, 4th Dec 2007
Most radio-controlled clocks have a button you can press to force them to receive the signal "on-demand" (it usually takes about 3 minutes). Normally the clock display shows whether this was successful or not.
How far apart are the times?
Andrew, what band would the transmitted frequency be? paul.fr, Wed, 5th Dec 2007
The web page referenced states that the MSF signal in the UK is at 60KHz.
i went to the place in denver. you can go in usually and see the clocks, but they were closed. kdlynn, Thu, 6th Dec 2007
Thanks George, i guessed it was either lw or mw, but it's always nice to know rather than guess paul.fr, Thu, 6th Dec 2007