Re: Coax Cables for High Voltage Transmission (fwd)

[<sroys@xxxxxxxxxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 17 Nov 2004 14:14:32 -0500
From: Jack Vandam <snotoir7674g@xxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>, hvlist <hvlist@xxxxxxxxxxxxxxxxx>
Subject: Re: Coax Cables for High Voltage Transmission (fwd)

Thanks for sharing!  If I might ask, what type of epoxy are you using to
glue the PE tube to the metal?

Thanks,
Jack

----- Original Message -----
From: "High Voltage list" <hvlist@xxxxxxxxxx>
To: "hvlist" <hvlist@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, November 17, 2004 2:00 PM
Subject: Re: Coax Cables for High Voltage Transmission (fwd)


> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Wed, 17 Nov 2004 11:06:01 -0600
> From: Dr. Resonance <resonance@xxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Coax Cables for High Voltage Transmission (fwd)
>
>
> Polyethylene or polypropylene works better as it has less creepage and
> leakage current factors than pvc.
>
> We drill out the entire interior part of a SO-239 chassis connector.  They
> we epoxy a 5 inch long PE tube into the SO-239 connector.  At the end of
the
> tube we epoxy in a small bananna receptacle.
>
> This allows a nice fit to standard RG-8 cable as a DC HV connector.  The
> shield is soldered to the PL-259 plus while the center part is stripped of
> the braided shield as it extends into the PE tube with a bananna tip
solder
> to the coax cable tip.
>
> Dr. Resonance
>
> Resonance Research Corporation
> E11870 Shadylane Rd.
> Baraboo   WI   53913
>
> >
> > 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
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
>
>