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
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|