Subj : NASA, shuttle, anyone?
To   : MARK LEWIS
From : WAYNE CHIRNSIDE
Date : Fri Aug 19 2005 07:24 pm

->  WC> You should have seen me jump when I built a HV power supply
->  WC> with 25KV and enough current to light cardboard afire in under a
->  WC> second across a 3/4 inch gap.

->  WC> It stayed in a drawer unused after that until I moved and tossed it
->  WC> in the trash.

->  WC> Took me 90 minutes to build on the cheap.

-> i hear ya... i have a self built power supply that uses a transformer from 
an
-> old pinball machine... several bridge rectifiers on it off the taps... one 
tap
-> is rectified to an 8 pole double throw high voltage relay that controls 
power
-> to all the other outputs with one set of contacts used to short the huge 
filter
-> capaciters across some resistors to drain them when the power is off... when
-> the power is on, the caps filter the main 12 volt supply voltage... it was 
just
-> something that i threw together to power 12 volt stuff on my bench and i
-> decided to also tap off 5 volt for some digital stuff as well as a few other
-> voltages needed for those circuts... i even had a computer connected to it 
at
-> one time using it for the power supply instead of a switching supply like we
-> more commonly see... worked great and handled everything that that system
-> needed power for... AIR, i still had enough capabilities to connect in a car
-> radio for some music O:)

I just took a TV flyback and made an external 8 turn winding center
tapped and drove it with a push - pull oscillator made with hefty
TO-3 transistors.
Ran at about 20KHz and drew 10 - 11 amps at 12 volts.

Got the idea from a books by a company still on the web I believe at
www.amazing1.com IIRC

Odd bunch of stuff there, much plausably works, of many I'm dubious.
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