"John Doe" wrote in message
...
Quite A number of (Years or Moons ago) depending on how you keep track of
time, someone came to one of the hamfests in Gaithersburg, Maryland, in a
large box
type of truck, and mounted on top of the truck was a CAPACITOR CANNON of
sorts.

I think that I need to clarify a bit - apparently the capacitors did not
really explode, but SNAPPED IN DISCHARGE STATE causing a louder than life
noise, and could be recharged to do it continuously.

At a push of a button this object sounded like a number of VERY LARGE
CHERRY
BOMBS going off in succession.

Yes - it was an attention getter.

Does anybody else remember this device and or have a schematic for it?

There is, or was a site on the internet that had these sorts of high energy
items. Tesla coils, magnetic coin mashers, capacitive discharge banks (which
sounds like what you are describing) etc.

Basically you are going to charge up a whole passle of high voltage caps
then short the output so that you create a minature lightning bolt, thus the
boom. Too dangerous for me. Not to mention the amount of magnetic pulse you
are going to let off right close to the audience's cell phones, laptops,
handhelds, etc. I wouldn't want the bill for repairing everyone's
electronics after you scramble them.

thanks, John.
KC5DWD