Date: Thu Feb 15 10:55:05 2007

Author: Bernard Cleyet

Subject: Re: Incandescent Bulb Destruction and Uses

Of course one should monitor the currents w/ and w/o the magnet either
by inserting low value resistors or coils. Some scopes come w/ a current
probe and a front panel calibrator.


Jerry DiMarco wrote:

> I didn't know magnets are used for arc suppression, but that's
> the answer. Since the bulb is in parallel with the coil, if you
> suppress the arc more current is forced through the bulb. That's why
> it burns out. This also makes me wonder what the back emf does to the
> power supply. You would want to have something hefty to handle the
> surge. Is that why he put the magnet over the switch?
> Jerry
> At 04:16 PM 2/14/2007, you wrote:
>> From: WC Maddox
>> No change to method. A string is attached to switch handle to open it
>> quickly with or without magnet.