[simpits-tech] RE: CP Clock

[Rochester, Craig]

--Not an EE--

I thought most AC clocks work by gear set connected to the works, and the
motor speed is determined by the Hz.  AFIK most AC motors will NOT work when
supplied a DC voltage.  Of course, I was wrong once before. :-)

http://members.aol.com/ljkamm/motors.htm
<http://members.aol.com/ljkamm/motors.htm> 



		-----Original Message-----
		From:	jay-anna [mailto:jay-anna@mindspring.com]
		Sent:	Thursday, October 24, 2002 12:21 AM
		To:	simpits-tech@simpits.org
		Subject:	[simpits-tech] RE: CP Clock

		I recently acquired a Waltham A13A/L aircraft clock.  This
looks exactly
		like the one in the F-16.  It may be the one in the F-16 as
it fits
		exactly into the Right Aux panel hole for the clock.
Anyway, on the
		back of the clock is a 3 pin connector to hook up power to
the clock to
		run the back lighting.  The guy I got the clock from had
originally told
		me it was 5 V DC with one pin hot, the other ground and the
other not
		used.  I hooked up some power from one of my PC's mole
connectors (5 V
		DC) to the +/- terminals and it lit up just fine.  Did it
repeatedly to
		make sure I didn't blow out any bulb or circuit.  I email
the guy back
		about the connector and what the max amperage might be (so
that I could
		later place a fuse in the power line to prevent any power
surge from
		popping the light bulbs inside) and he told me that someone
told him
		that the lighting operates on 5 V AC not DC.  Does anyone
know for sure
		what the requirements of this clock are?  To any EE out
there, can an
		item wired for AC work on a DC current?  I didn't think that
was
		possible.

		Jay "crease-guard"

		"Show me a man who cannot be bothered to do the little
things, and I
		will show you a man who cannot be trusted to do the big
ones."
		--Lawrence Bell, Founder Bell Hellicopter




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