[Amps] shielded HV connector

[Jim W7RY]

I like those Steve!  I have not seen them before. I did a Google search for 
a picture of one...

I did not want to use a "standard" coaxial connector, even a type N or BNC. 
I have too much equipment in the shack with those types of connectors.  And 
I did not the looks of the HN because of the pin exposed.

73
Jim W7RY



----- Original Message ----- 
From: "Steve Thompson" <g8gsq at eltac.co.uk>
To: <amps at contesting.com>
Sent: Saturday, December 27, 2008 12:17 AM
Subject: Re: [Amps] shielded HV connector


> For total safety I prefer SHV connectors. It's not possible to touch the
> centre pin on either half accidentally and they guarantee to make the
> ground first and break it last when mating. They use RG58 cable which is
> conveniently small and flexible and comfortably handles all realistic
> supply voltages.
>
> Sure, they cost a bit more than the alternatives, but how much is your
> life worth?
>
> Steve
>
>> Some commercial high voltage power supplies use a modified PL259 type
>> connector. For the HV cable, they use the outer shroud of the male PL259, 
>> but
>> the RG8 cable center conductor sticks out about 3 inches, to give a long
>> creepage path in air. It has a banana plug at the end.  Then, inside the
>> chassis of the matching power supply, the PL259 jack is there, minus the
>> insulator and center pin. The aforementioned HV cable screws on, and the 
>> long
>> dongle of wire pokes into a mating banana receptacle, mounted on a 
>> circuit
>> board 3 inches inside of the power supply. I made it sound simple, 
>> actually
>> there is more to it than that, including a way to ensure that the banana 
>> pin
>> goes into the socket, then the PL259 threads are cinched on as the 
>> shield.
>>
>> I have seen this on units up to 20 kV, so it seems to be reliable and 
>> very
>> cheap.
>>
>> 73 and Happy New Year
>> John
>> K5PRO
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