Re: Stripped Coax

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Jim Lux" <jimlux@xxxxxxxxxxxxx>

The nominal voltage ratings on coax are for RMS voltage, at an frequency of
several MHz, and allow for a infinite mismatch.

The DC standoff voltage is much higher, in practice (albeit, not guaranteed
by the mfr).

anything with foam insulation (very common for cable TV coax, to reduce
weight, cost, and loss) is useless for HV.  So, most of the RG-59/RG-6 type
stuff you see inexpensively isn't particularly useful.

What you want is the solid dielectric stuff RG-8/RG-213, etc...  It's
usable, with care, to 50kV DC.  Certainly good for 10-20 kV.

For what it's worth, there is no such thing as Mil-Spec RG-213, RG-8, RG-58,
etc.  The Mil-specs for those types of PVC jacketed coaxes were discontinued
some years ago.



----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, May 06, 2005 10:01 PM
Subject: Stripped Coax


> Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>
>
> I saw a note from Dr.R about using stripped coax , I ran across a good
deal
> on a 500 roll of RG-6 , a 500ft roll of twin RG-6 and about 800ft of a
1000
> ft roll of what looks like RG-11 , 14 solid and foam , all marked as phone
> line, good to 1ghz. It has the duel shield and sticky alum wrap. The HV
> rate on what I look up is not very much on this, can any one give me a
> rough idea on what voltage it is good for with Tesla use, stripped and/or
> unstripped??
>
> Rich
>
>