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

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

Original poster: "Jack Vandam" <snotoir7674g-at-mindspring-dot-com> 

I like your idea, but finding a plastics fabricator wouldn't be inexpensive.
I'm thinking more along the lines of a heavy plastic bucket with lid of some
type.  If I take the 1" clearance factor into account, the transformer
should fit into a 12" inside diameter bucket and 12" high should do too.  I
already checked for pvc pipe sources in 12" size, but rare and expensive for
a non-standard 12" length.

Jack


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, September 27, 2004 6:38 PM
Subject: Re: high voltage technique for external access to x-ray
transformer?


 > 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
 >  >
 >  >
 >  >
 >
 >