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RE: Coax Cables for High Voltage Transmission (fwd)

To: hvlist <hvlist@xxxxxxxxxxxxxxxxx>
Subject: RE: Coax Cables for High Voltage Transmission (fwd)
From: <sroys@xxxxxxxxxxxxxxxxx>
Date: Fri, 19 Nov 2004 15:24:15 -0700 (MST)

---------- Forwarded message ----------
Date: Fri, 19 Nov 2004 12:43:18 -0800
From: David Trimmell <humanb@xxxxxxxxxxxxxxxxxxx>
To: 'High Voltage list' <hvlist@xxxxxxxxxx>
Subject: RE: Coax Cables for High Voltage Transmission (fwd)

Epoxies will not 'glue' PP or PE. They are normally 'welded' or 'RF sealed'.
There is a material that will actually glue PE, but it is not cheap by a
long shot, I can't remember its name off hand. The epoxies will stick
reasonably well to PVC and Poly Carbonate, but they will at best 'grab' onto
PE. You can rough up the surface of both materials to be bonded and use an
epoxy, but that will not make for a oil proof, or a very strong bond. There
are PE welding kits around...

Regards,

David Trimmell 

-----Original Message-----
From: High Voltage list [mailto:hvlist@xxxxxxxxxx] 
Sent: Friday, November 19, 2004 8:51 AM
To: hvlist
Subject: Re: Coax Cables for High Voltage Transmission (fwd)

Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Thu, 18 Nov 2004 12:07:07 -0500
From: Jack Vandam <snotoir7674g@xxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Coax Cables for High Voltage Transmission (fwd)

Maybe Devcon "plastic welder" epoxy?  I have some here and have been using
it to keep mineral oil from leaking from a sealed polycarbonate container.
So far, seems to be working very well, but I haven't tried it with PP or PE
plastics.

Jack

----- Original Message -----
From: "High Voltage list" <hvlist@xxxxxxxxxx>
To: "hvlist" <hvlist@xxxxxxxxxxxxxxxxx>
Sent: Thursday, November 18, 2004 11:47 AM
Subject: Re: Coax Cables for High Voltage Transmission (fwd)


> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Wed, 17 Nov 2004 22:34:46 -0600
> From: Dr. Resonance <resonance@xxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Coax Cables for High Voltage Transmission (fwd)
>
>
> As I recall it's made by Devkon.  I'm in AZ so I can't run out to the shop
> and check.
>
>
> 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 9:55 PM
> Subject: Re: Coax Cables for High Voltage Transmission (fwd)
>
>
> > Original poster: <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
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> >
>
>
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