[simpits-tech] RE: CP Clock

[Marv De Beque]

I would think DC is fine.  If you want to fuse it, 1/2 to 1/4 amp would be
fine.  The purpose of the fuse is not to protect the clock, but to prevent
the wires in the circuit (before the clock) from melting and catching fire
or dragging the bus supply down.

Put the fuse as close to voltage source as you can.
-- 


> From: "jay-anna" <jay-anna@mindspring.com>
> Reply-To: simpits-tech@simpits.org
> Date: Wed, 23 Oct 2002 23:20:54 -0500
> 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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