Re: what is this?

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

Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" <Mddeming-at-aol-dot-com>

Hi Josh,

It is a filament transformer for a very high voltage system. I have a 
full-wave bridge tube rectifier from a vintage X-ray machine. There are 
separate filament transformers for each tube. The tubes are rated 10ma -at- 
140 kV, but operate at 85 kV. Each requires only 10v across the filament 
but each may be at 140 kV relative to the primary and/or relative to each 
other, hence the massive insulation. Any application where the cathode 
voltage is at times kVs above ground potential needs a highly insulated 
filament transformer like this one. For more info you might consult a 
vintage book on X-ray machines such as "Roentgenographic Technique" by D. 
A. Rhinehart (1943) or "Fundamentals of X-ray and Radium Physics" by J. 
Selman (4th ed.1967)

Hope this helps,

Matt D.

In a message dated 6/13/03 8:18:35 PM Eastern Daylight Time, 
tesla-at-pupman-dot-com writes:



>Original poster: "J Dow by way of Terry Fritz <teslalist-at-qwest-dot-net>" 
><jdowphotography-at-hotmail-dot-com>
>
>http://cgi.ebay-dot-com/ws/eBayISAPI.dll?ViewItem&item=3029990603&category=4675
>
>Hello all
>do you fellas know what this is?
>
>thanks
>read you later
>Josh