Re: HV power supply

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Paul Marshall by way of Terry Fritz <twftesla-at-qwest-dot-net>" <klugmann-at-hotmail-dot-com>

Sorry, I see two problems here one with 10 ma youll never charge your cap. 
The energy will bleed off faster than you can apply it. The second problem 5 
Kj isn't enough to shrink quarters. You have to be above 6 and preferable 7 
Kj to get started.




>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: HV power supply
>Date: Sat, 11 May 2002 20:41:47 -0600
>
>Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><Tesla729-at-cs-dot-com>
>
>Hey all,
>
>I'm sort of looking for a decent metered, filtered HV power supply
>without spending a  fortune. I am looking for something that
>can put out at least say 20 kVDC at at least 10 mA. I've been
>looking on ebay some for this but it seems hard to find exactly
>what i'm looking for for under $300, especially when you start
>figuring shipping. I'm needing something like this to charge my
>(2) 100 uFD, 10 kV energy discharge caps for my quarter shrinker
>safely within a reasonable time frame ( < 2 minutes for a 10 kJ
>charge is what I'm aiming for). I'm no engineer, but I know that you
>can charge a cap a lot faster if the supply voltage is considerably
>higher than the voltage that you are trying to charge the cap to,
>so long as you quit charging when the cap reaches its rated voltage.
>My current charger uses (2) 15/30 NSTs full wave rectified thru (2)
>diode sticks from an x-ray tranny to the center tap ground of the
>NSTs. Even when fed by a variac with 140 volts, these output DC
>voltage with the load of charging these caps dosen't get much above
>10 kV, so I can charge the caps to say 80% of their rated voltage
>within a couple of minutes but it takes almost forever to fully charge
>them to 10 kV :-(
>
>Anyway, a nice little HV power supply like Terry has would be nice :-)
>Anybody got an extra HV supply that they would like to sell to a good
>home for a reasonable cost? Or can someone point me in the right
>direction for obtaining one?
>
>Spark Safely,
>David Rieben
>
>
>