Re: X-ray trans circuitry question

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

Original poster: BunnyKiller <bunikllr-at-bellsouth-dot-net> 

Okayyyy   Ill give it a try...

Control box:  variac most likely supplies a voltage/current control to the 
filament transformer ( smaller transformer on the main transformer plate)
the gold colored transformer is going to be an isolation transformer ( 
since it is a medical device) (( water cooled???))  I dont see any pulse 
width modulation circuitry...  it can be assumed that this is a model older 
than 15 yrs.

main transformer plate:  obviously the big transformer is the 60KV 
unit   leads go to a ( looks like a full wave rectifier) DC 
rectifier/filter... the smaller transformer will be the filament which its 
output will be attached to the HI Volt output ( the filament output could 
be AC, in laser applications it is AC)   it would be interesting to see 
what the value is on the cap near the rectifier boards...

on the transformer plate, you will want to keep the rectifier boards, cap, 
main transformer.   You can remove the smaller filament transformer.  The 2 
yellow leads ( smaller ones on the side of the 60KV trannie are the 200+ 
VAC input...)  the hi volt outputs ( VAC ) are the 2 well insulated wires 
on the other side of the hi volt trannie which go to the rectifier boards 
and cap.   ( cant tell from the picture where the DC hi volt exit to...) 
but Im going to guess it exits the top plate on the other side of the cap 
mounted to the plate....

the smaller wires exiting the rectifier boards ( near the multiple 
insulators) are most likely feedback signal/sources for meters and the such.

the 2 loose black leads are the inputs to the filament trannie ... ( they 
are too close to each other and not insulated well enuf to be hi volt wires)

the "fuses" are spark gaps, they probably shunt hi volt spikes to ground

hope this helped...

Scot D



Tesla list wrote:

>Original poster: "Ben Ziegler" <crossguy-at-hotmail-dot-com>
>Last weekend's trip to the junkyard yielded the following large piece of iron:
>http://seras.math.uiuc.edu/~cjschult/tmp/tmp.html
>
>  It's rated output is 60kv, 3.5kVA.  I hope to use it as a Marx bank 
> power source.  I've never dealt with one of these beasts before.  As far 
> as I can tell, the hv tranny is supplied with conditioned 220V from the 
> gold transformer (at the leads in the foreground of the center 
> picture).  The outer winding on the large core is connected via heavily 
> insulated leads to the resistor network.  Five additional inputs enter 
> the picture here, two attached to the resistors, three go into one 
> winding on the smaller core.
>  The resistor bank is attached to a hv capacitor and the short winding on 
> the small core.  The short winding has two outputs hanging loose, which I 
> assume are the final hv output.  I'm also assuming the resistors, 
> capacitor, the second core and windings are current limiting circuitry.
>  I ask for help understanding the circuitry in the transformer.  The 
> resistor bank, for example, has some  'mystery' devices on it that I've 
> never seen the counterpart to: a yellow plastic 'black box' with two 
> leads, a couple of sealed glass tubes that resemble blown fuses or spark gaps?
>I will post a crude schematic once I figure some more out.
>
>thanks,
>Ben Ziegler
>--
>btw, the x-ray tube has been rendered inoperable post-photo.
>
>