[MOSFET]

Actually, the thump would be caused by the change in signal from its old
voltage to its new one (ie: the transition from 0v to 12v). This would not
be DC, but a momentary AC riding a DC level.

How's that for nitpicking? :-p

Chris

WOW. You win "nit-picking" prize!!! Nice work, though I don't quite
understand what you are saying (but, of course, that can often be a key
nit-picking strategy).

Nick