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

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

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