[Amps] SHV connectors great, but where to find coax?

[TexasRF at aol.com]

Dave and all, the last SHV connectors I purchased were from Pasterrnak, the 
 high priced specialist folks.
 
They have SHV cable and mating chassis connectors for RG213/U coax. II  
wanted the security of extra voltage handling because of around 10 KV used in a 
 twt power supply.
 
The coax connectors were about $25 and the chassis connectors were about  
$15.
 
They worked out really well and I will never use any other type of hv  
connector on future projects.
 
A three inch length of heat shrink was installed on the cable ends for  
reinforcement and added mechanical security for the coax shields. This is a  
cheap and effective way to add protection in a critical for safety  location.
 
I have wondered if adding a dab of silicone grease to the center pin to  
coax dielectric area before connector assembly might be a good idea to 
eliminate  air gaps and moisture traps. Any opinions on that?
 
73,
Gerald K5GW
 
 
 
In a message dated 9/11/2010 4:41:21 A.M. Central Daylight Time,  
david.kirkby at onetel.net writes:

On 11  September 2010 04:44, Carl Clawson <carlclawson at verizon.net>  wrote:
> I've enjoyed all the back and forth over HV connectors on this  group. 
I've
> become quite positive towards SHV connectors but for one  thing: where do 
you
> find short lengths of HV rated coax? As far as  I've been able to find, 
you
> can't buy less than 1000 feet at a  time.
>
> The DC dielectric strength of polyethylene being on the  order of 20 
kV/mm, I
> suspect that the rated stuff is not very  different from ordinary everyday
> coax except for testing and  qualification, but I just feel better using
> components withing their  specifications when I can.
>
> 73, Carl WS7L
>
You don't  need anything other than "standard" coax. By that I mean,
whatever the  manufacturer of the plus says. It'sits RG/59, use that.
You need to cut the  coax how they say too.

I would certainly not decide to use a PTFE coax  - use what they are
designed for. I'm not saying PTFE coax wont work, but  what I am saying
is they would have been extensively tested with the right  coax.

If you don't have the installation instructions, then I suggest  you
get them. I expect you can find them on the web. If the worst comes  to
the worst, I probably have the instructions for one.

As a matter  of interest, what are people paying for SHV  connectors?

Dave
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