Re: More on Coax Cables for High Voltage, and Connectors (fwd)

[<sroys@xxxxxxxxxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 17 Nov 2004 17:31:47 -0600
From: Dr. Resonance <resonance@xxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: More on Coax Cables for High Voltage, and Connectors (fwd)

Use polypropylene for polyethylene for the tube.  Usually 5 inch length is
sufficient.  If you drill out a standard SO-239 chassis connector with a 1/2
inch dia. bit the tube fits perfect.  Epoxy in place.  Then epoxy a bananna
receptacle on the HV end of the tube.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
----- Original Message ----- 
From: "High Voltage list" <hvlist@xxxxxxxxxx>
To: "hvlist" <hvlist@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, November 17, 2004 1:01 PM
Subject: More on Coax Cables for High Voltage, and Connectors (fwd)


> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Wed, 17 Nov 2004 11:37:00 -0700
> From: John Doran <johnd@xxxxxxxxxxxxxxx>
> To: hvlist@xxxxxxxxxx
> Subject: More on Coax Cables for High Voltage, and Connectors
>
> I have checked out another power supply in my lab, a Kilovolt
> Corporation 0-30 kV variable-output unit, and I found that it employs
> RG-8 for its output connection as well.  So, between this and the Del,
> we have some significant commercial precedent for using the coax for
> high voltage service.
>
>
>
> I bought my RG-8 from Radio Shack; the stuff had actually been
> manufactured by Tandy Wire and Cable.  I felt that the shield coverage
> was a bit sub-standard for RF use, but it had the thick solid
> polyethylene dielectric (I looked, in the store, before I bought it).
>
>
>
> The gray PVC (or is it ABS?) pipe that I used for my connector bodies is
> the "half-inch" (ID) stuff.  I cut my pipe to about 2.5 inches long, but
> you can make them any length appropriate for the applied voltage.
>
>
>
> I had got the idea for this connector from another design I had seen in
> commercial gear, in which a heavy acrylic block had been bored out to
> accept the jack and the cable.  In that design, the hole is only a
> little larger than the cable.  My pipe is a bit larger than the cable,
> but this has caused me no problems-the beveled opening in the banana
> jack allows the cable to mate up OK without snagging or hanging up.
>
>
>
> I see no reason that a mating pipe cap cannot be used at the rear of the
> connector, but at the front you want something flat, because it serves
> as the mounting flange.
>
>
>
> -John
>
>
>
>
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>