At 10:51 PM 7/21/2010 Wednesday, Richard A Jones wrote:
>Oh, three things:  it must be "two stage."

All Marshall Brass 290s are two-stage, it's a major defining characteristic.

:-)
d
ps -- Larry Alofs pointed out to me that the state of the art in
capacitor manufacture has gotten to the point where a capacitor to do
what you were talking about with the delayed-off light would only be
the size of say a quart thermos, and you can buy one today for
perhaps $60.  Still completely impractical for that usage, but a far
cry from filling the front seat.  I am gobsmacked -- one-farad
five-volt capacitors that are about two inches by 3/4.  If you'd told
someone that in 1965, say, you'd have been laughed out of town.