Re: high voltage technique for external access to x-ray transformer?

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Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


Without some massive feedthru bushings you can't get the potential outside
an X-ray xmfr.

Best bet is have a local plastics fabricator produce a nice 3/8 inch thick
acrylic case for you.  Have a small 3/4 inch wide flange on the top so you
can attach an acrylic cover.  With plastic your coil to wall clearance can
be 1 inch and the HV can be brought out the top with common silicone neon
sign HV cable.  Keep this cable suspended away from ground as the cable is
rated at 15 kV and won't hold of 45 kV (1/2 your output from a single coil
in the X-ray xmfr) if it touches ground.

Using an external current limiting reactor you can run 4-5 kVA on short duty
cycles for beautiful climbing arcs.  Use caution --- these potentials are
very lethal!!

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, September 27, 2004 12:14 PM
Subject: high voltage technique for external access to x-ray transformer?


 > Original poster: "Jack Vandam" <snotoir7674g-at-mindspring-dot-com>
 >
 > Hi folks:
 >
 > Thanks for the great responses to my previous inquiries.  It's wonderful
to
 > see the vast amount of high voltage experience here.  Another question if
I
 > may, this time concerning how to properly fabricate a high voltage
terminal.
 > I have a small dental x-ray transformer of the Picker/ SS White type (90
Kv
 > -at- 7 mA max).  It is already within its chassis (original metal x-ray
 > tubehead) and would need filled with oil for proper operation.  Since I'd
 > like to make the hv accessible from outside the case, what would be the
 > cheapest and most insulating way to provide external high voltage
terminals?
 > On the big Westinghouse unit I spoke of recently, I noticed that its
sockets
 > were recessed and composed of bakelite or similar.  How they are attached
to
 > the metal is unknown though as I would imagine some sort of seal to keep
out
 > ouside elements.  Anyway, any thoughts here would be appreciated.  I know
 > you guys have had to deal with these issues in your hv work and may be
able
 > to give me some ideas.
 >
 > Thanks,
 > Jack
 >
 >
 >