All this chatter about the "Austin Healey Barbie Clock". Is this something
new or old? What does it look like? Where do I get one?
Mad Mike
----- Original Message -----
From: Bob Spidell
To: Josef.Eckert@t-systems.com
Cc: healeys@autox.team.net ; stmiller96@hotmail.com
Sent: Friday, April 09, 2010 8:28 AM
Subject: Re: [Healeys] Austin Healey Barbie clock radio
Off topic, but .... I've never heard of the power frequency (60Hz)
'sliding' off, at least not here in the States. The voltage can drop
from an overload--i.e. a 'brownout'--but the only thing that could
change the frequency is generator speed changing. Since all the power
producers--hydro, wind, gas, coal, nuke--are tied together in a grid
they are precisely synchronized.
Frequency would only affect an electromechanical clock--one driven by an
electric motor. The Barbie clock is solid state--AC is converted to DC
for use by integrated circuits (like the LED display). A frequency
change would have little to no effect. Most modern electronics have
switching power supplies--they rectify the AC to DC then smooth the DC
with capacitors and step it down--converting back to AC or pulsed DC
then back to DC--as required (+/- 3V, 5V, 12V, etc.).
bs
Josef.Eckert@t-systems.com wrote:
> The Barbie clock radio is frequency triggered. It works well with a
constant
> 60 Hertz frequency. In Europe with a 50 Hertz frequency or when the
frequency
> slides off because of overload in the power supply system the clock could
not
> keep the time anymore.
>
> Josef Eckert
> Konigswinter/GERMANY
>
--
*******************************************************************
Bob Spidell San Jose, CA bspidell@comcast.net
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