[Amps] Single pole Millen HV connectors.

[Ian White GM3SEK]

Jim Thomson wrote:
>The single-pole Millen connectors are also dangerous because there's 
>nothing to prevent a user from connecting only the B+, with no B-minus 
>or ground return. With a separate RF chassis, switching on will give 
>you a live chassis.

>You won't get any live chassis, if the chassis in question is properly 
>grnded. ###  All my  RF decks are separate box's.   B+  supplies  are 
>each in their own box. ##  I treat the B- like it was hot.... and used 
>the Black Millens  at both ends.... Rf deckand mating HV supply... and 
>used Black belden 10 kv hv wire. ## The kicker is...  BOTH  chassis's 
>are bonded  directly together ! .... with a separate 8-10 ga cu 
>wire..and heavy lugs on each end.    In addition, both the RF deck 
>chassis and the  HV  chassis, each have it's own wire.. from each's 
>chassisto electrical utility grnd.
[... and several other good safety precautions too.]

That's great... but it's only safe if you ALWAYS connect the B-minus 
and/or ground bonding BEFORE you connect the B+ and switch on.

With a single-wire B+ connector, you are literally betting your life on 
doing everything in the right sequence.

I do everything that you do, for sure, but also:

1. Coaxial B+ connection using SHV, so B+ can never be connected without 
also grounding the RF deck chassis; and

2. Remote control of the HV power supply through the same multi-way 
cable and connector that also includes B-minus and ground. If that 
connector isn't in place, there is no power to the HV mains relay.



-- 

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek