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Re: [Amps] HV Connectors

To: "" <>
Subject: Re: [Amps] HV Connectors
From: "Fuqua, Bill L" <>
Date: Mon, 24 May 2010 10:25:23 -0400
List-post: <">>
Don't use any thing with foam dielectric for HV applications. Much of the 
insulation is from the gas bubbles in the in the dielectric and if you flex it 
enough the center conductor will mash the foam and reduce the breakdown 
voltage, also if you should mash or kink it you will have the same results. You 
can use RG-58 type cables with stranded center conductor but solid  insulation 
at nearly as high of voltages as RG-59.

Bill wa4lav

From: [] On Behalf Of 
Roger []
Sent: Monday, May 24, 2010 4:04 AM
Subject: Re: [Amps] HV Connectors

On 5/24/2010 1:34 AM, Fuqua, Bill L wrote:
> There is a SHV connector which has a long shielded cylinder that extends some 
> distance from past the BNC like part.
> They are commonly used with HV connectors in scientific applications. They 
> are expensive but very good and safe.
> Pasternack has plugs for17 to $25 each
Every thing is relative, but I'd not call $17 to $25 expensive.
> and sockets for around same range. There are some that are even longer.
> RG59 Cable is good for well over 5kV DC voltages. We use it up to 8 and 10 kV 
> at times with no problems.
I'd much prefer the RG-8X with shield plus braid.  More rugged, more
flexible, sufficient voltage rating, and a larger (and much more
flexible) center conductor.
I really don't like RG59 with that tiny, hard, easy to break center
conductor except for things like TV and F-type connectors.
I use relatively short runs from the remote switches to the 40 meter,
center fed, half wave dipoles and the legal limit.


Roger (K8RI)
> 73
> Bill wa4lav
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