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Re: Latest acquisition

Original poster: "Christopher Boden by way of Terry Fritz <twftesla-at-qwest-dot-net>" <chrisboden-at-hotmail-dot-com>

>Original poster: "J. B. Weazle McCreath by way of Terry Fritz 
><twftesla-at-qwest-dot-net>" <weazle-at-hurontel.on.ca>
>Hello Coilers,
>Remember a few weeks back I asked about making a ballast from a
>transformer I got out of an X-ray machine?  Well, earlier this
>week I also acquired the main transformer and rectifier unit.

Rectifier unit? It's seperate? I have a LARGE collection of X-ray 
transformers (and some for sale if anyone's interested, $250 each + shipping 
(and I'll drain them for shipping if you like)) and ALL of them have the HV 
rectifiers internal to the transformer tank. I have solid state and tube 
models, ALL non-PCB.

FYI, I have it confirmed from 3 seperate professionals that GE has NEVER 
used PCB in ANY of it's medical duty (X-Ray) transformers. They HAVE used 
them in several other types, but if you have a GE X-Ray tranny, you're cool.

>Before I do anything with it, I was wondering if it could be put
>to use just as it is?

Sure, if it's SS (like you describe), it's on the low voltage side of X-Ray 
(most of mine run about 150kV, but I have a pair of the 50kV) it's outputing 
pulsed DC and will have a wicked arc. Great for JL work (I have a EHV JL 
question below), and other things.

The entire unit is in a oil filled tank
>which measures about a foot square and stands three feet high.

and about 250Lbs with oil probably

>Within the tank is a three phase transformer, and an impressive
>looking rectifier stack, complete with bleeder resistors, and a
>voltage divider network for metering purposes.
>The label on the unit, made by Siemens, was in German which I had
>a friend translate for me.  The input is 237 Volt, 60 Hertz, three
>phase, and the output is 50 Kilovolts D.C.
>It was manufactured in 1986, so there's not likely a chance of the
>cooling oil containing any PCB's, but non the less, I'm not going
>to take a bath in it.  Common sense rather than EPA hysterics will
>be the way I'll deal with that!
>Suggestions for possible TC or other HV applications appreciated!

Useless for TC work (voltage too high to be easily worked with, caps would 
be expensive, but it IS possible.) if you DO use it for TC work it would 
probably be rather efficent according to John Frau's site. And he's the God 
of efficiancy in coils :)

It would rock for a JL, or a Marx bank. They're also fun just to tinker 
with. I'm having a blast just winding up our big one to hear it scream and 
sizzle before breakout. 150kV is a LOT of force :)

JL Question.

I have a BEAUTIFUL JL test setup (used for testing X-ray trannies and Pigs) 
but when I hook a SS X-ray trannie to it the arc is MASSIVE, BRIGHT and 
thick white hot. It also doesn't rise at ALL.


I REALLY want to make a nice wide JL for the lobby. Something with a 2' 
spread would be nice :)

Reply off list, off topic and all.

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