On Thu, 18 Mar 2004 21:40:58 +0000, Ian White, G3SEK wrote:
>Then feed each side separately through its own
>*three-wire* mains filter that includes a ground choke.
Hmmm. Are you putting a choke on the ground lead? Doesn't that prevent
the protection it SHOULD provide for HF transients like lightning and
power line misbehavior? I can't imagine that being blessed by an EE
that can read and write. All codes I know of require a low impedance
bond between grounded objects. That choke has a high impedance at some
frequency.
Or do I misunderstand what you are suggesting?
But your post does remind one that all that noise current being shoved
into a long ground lead by bypass capacitors can radiate and get picked
up by your antenna. While a choke would minimize the ground current, it
doesn't pull the current to ground. Unfortunately, a choke on the
ground conductor is a cure that is worse than the disease.
Jim Brown
Audio Systems Group, Inc.
Chicago
http://www.audiosystemsgroup.com
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|