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

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

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


Try using polypropylene tubes.  PVC is hygroscopic, water molecules will
attach on humid days, and the HV tracking slowly begins to destroy your
tube.  PP works much better for this application.

Dr. Resonance


 > 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
 >  >
 >  >
 >
 >
 >