On 5/24/2010 10:25 AM, Fuqua, Bill L wrote:
> 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.
>
>
I keep hearing that, but I've never had a problem in all these years
using 8X. If it did arc it'd just dump the supply.
OTOH I've never used it over 3KV. I have OTOH squashed both RG58 and 59 .
73
Roger (K8RI)
> 73
> Bill wa4lav
>
> ________________________________________
> From: amps-bounces@contesting.com [amps-bounces@contesting.com] On Behalf Of
> Roger [sub1@rogerhalstead.com]
> Sent: Monday, May 24, 2010 4:04 AM
> To: amps@contesting.com
> 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.
>
> 73
>
> Roger (K8RI)
>
>> 73
>> Bill wa4lav
>>
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>>
>>
>>
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