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