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@onetel.net writes:
On 11 September 2010 04:44, Carl Clawson <carlclawson@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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