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> 

Thanks.  I was wondering about that and will keep an eye out for the pp
tube.  Jack


 > 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
 >  >  >
 >  >  >
 >  >
 >  >
 >  >
 >
 >