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 also have x-ray cables, but they are too large for the Westinghouse unit.
For that particular transformer, I have been considering making new hv plugs
from epoxy using a pvc pipe that just fits into the socket as a mold.  I
could have wires running through the epoxy to meet up and somehow join with
the hv cable.

For the other transformer, I haven't yet decided how I'm going to proceed-
probably with the plastic bucket idea I mentioned before.  PVC would be
better and I may look around for a piece of scrap somewhere.

I'll save your procedure for future reference.  Thanks for sharing.

Jack


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, September 28, 2004 12:41 AM
Subject: RE: high voltage technique for external access to x-ray
transformer?


 > Original poster: "Godfrey Loudner" <ggreen-at-gwtc-dot-net>
 >
 > I have x-ray cables, but I don't like the looks of them. Some lightning
 > arresters are made of some kind of rubber, and the internals can be
 > knocked out with a spike. What remains looks like a classic high voltage
 > terminal. I put a PVC pipe inside the insulator and a smaller PVC pipe
 > inside the larger one to fit down the federal standard sockets of an
 > x-ray transformer. Terminals are fitted on the ends, a 40kvdc wire is
 > strung down center, and the PVC pipes are filled with transformer oil.
 > Closing the ends was quite a hassel. A small hole is drilled on the top
 > end of a terminal to allow for oil expansion, and a dab a vaseline on
 > the vent hole takes care of moisture entering. After inserting two of
 > these and checking for continuity, melted vaseline is poured down the
 > sockets. This gives the tank a great look. But with this arrangement, I
 > have not taken the voltage up as far as when using x-ray cables. So far,
 > I have seen no corona where the terminals meet the tank. Being more
 > conservative now, I see no need to take x-ray transformers all the way
 > up---something might breakdown.
 >
 > Godfrey Loudner
 >
 > -----Original Message-----
 > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 > Sent: Monday, September 27, 2004 5:38 PM
 > To: tesla-at-pupman-dot-com
 > 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.
 > Dr. Resonance
 >
 > Resonance Research Corporation
 > E11870 Shadylane Rd.
 > Baraboo   WI   53913
 >
 >