On Thu, 27 Nov 2003 00:52:08 GMT, Mole wrote:

EMF kickback? I guess you mean the voltage drop. Never heard of EMF
kickback. And, yes, a voltage drop to sensitive equipment can damage it.
That's why using an accessory/house battery for the equipment is the best
route to go.

Bill's right, it's a spike produced by the collapsing magnetic field of the
solenoid. It can do some damage. As he says, put an oscilloscope across
the line and you'll see it.
--

Larry
email is rapp at lmr dot com