Re: Coax Cables for High Voltage Transmission (fwd)

[<sroys@xxxxxxxxxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 16 Nov 2004 23:03:00 -0500
From: Jack Vandam <snotoir7674g@xxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>, hvlist <hvlist@xxxxxxxxxxxxxxxxx>
Subject: Re: Coax Cables for High Voltage Transmission (fwd)

John, thanks for sharing your info on the hv connectors!  That design may be
just what I have been looking for.  I hope you don't mind if I ask you a
couple of questions:

What diameter and lenth of pvc pipe did you use and does it tightly fit the
polyethylene jacket of the cable?

I see you used sheet pvc for the ends of the insulators.  Could pvc end caps
have been used instead?

Any other info you want to share would be appreciated.  I have a +/-45 KV
metal housed x-ray transformer sitting here for which I would like to access
the high voltage for hobby and other uses.  Right now, it's sealed inside
the case and I have been thinking of making recessed terminals and
connectors so I can have high voltage access.  The insulated pve recesses
would be mounted through holes drilled through the metal chassis.
Connectors/ insulators similar to yours may in fact do the trick.  This
route may be the cheapest method (which is what I seek) and the other
alternative is to remove the transformer and rehouse it in a new container.
Didn't have much with that option until lately when I found some pvc "boxes"
that would work, although they are expensive.

Thanks,
Jack

----- Original Message -----
From: "High Voltage list" <hvlist@xxxxxxxxxx>
To: "hvlist" <hvlist@xxxxxxxxxxxxxxxxx>
Sent: Tuesday, November 16, 2004 2:20 PM
Subject: Coax Cables for High Voltage Transmission (fwd)


> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Mon, 15 Nov 2004 13:37:39 -0700
> From: John Doran <johnd@xxxxxxxxxxxxxxx>
> To: hvlist@xxxxxxxxxx
> Subject: Coax Cables for High Voltage Transmission
>
> Howdy!
>
>
>
> I use polyethylene-insulated RG-8 cable extensively for high-voltage
>
> use in my laboratory, at potentials up to 20 kV, and I have never had a
>
> problem with it.
>
>
>
> Spellman High Voltage uses it for potentials of only up to 8kV in their
>
> products,
>
>
>
> www.spellmanhv.com/tech/appnotes/AN-07.doc
>
>
>
> but I have a Del Electronics 40kV power supply "brick" that employs RG-8
>
> cable for its output connection.
>
>
>
> I have devised a simple HV connector for use with coaxial cable, and
> which
>
> may be modified for just about any potential.  I have posted details on
> my
>
> Web site-take a look at
>
>
>
>             http://timefracture.org/reg.html
>
>
>
> for more information and some photographs.  Please stay safe!
>
>
>
> -John
>
>
>
>
>