In a message dated 9/28/02 8:51:00 AM Eastern Daylight Time, 
[EMAIL PROTECTED] writes:


> OK, Larry,
> 
> I Gotta ask,
> Why the 100 watt light bulb in series ???

Simple ohms law.   The light bulb in series, not parallel, limits the current 
to the device you are testing.  If the lamp lights, then current flow is 
occurring and the system should operate.  It's a cheap way of limiting the 
current to power up a  device.  Kinda like a variable power AC transformer. A 
KX-TD1232 single cabinet draws 140W of power, just a little more than a 100W 
light bulb.  The current draw between the devices causes the lamp to glow 
dimmly, thereby showing current flow and limiting the flow to the device in 
question.

Limiting the current can help predict if a power supply, or other component 
was damaged, and possibly prevent something smoking.


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