[Amps] HV Connectors

[Roger]

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 at contesting.com [amps-bounces at contesting.com] On Behalf Of Roger [sub1 at rogerhalstead.com]
> Sent: Monday, May 24, 2010 4:04 AM
> To: amps at 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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