[Collins] Grounding attachments S-1 line

[Glen Zook]

I violently disagree!  One should NEVER depend on the
coaxial shield for either a safety ground or a
lightning ground.  Also, the shield of the coax may
not be grounded if the antenna in use is a direct coax
fed dipole.  The only place that it will get grounded
(in most amateur radio stations) is when it connects
to the chassis of one of the radio units.

I do regular presentations, seminars, etc., on both
r.f. grounding and lightning protection.  Although
what I recommend is not the only way of doing things,
the methods that I do recommend have been used in many
hundreds of commercial two-way radio, microwave radio,
and amateur radio applications.  For a synopsis of
what I recommend and for some rather crude diagrams(!)
go to either website that is listed at the end of this
message.

I have added a ground point on both my 75S-1
receivers, my 32S-1 transmitter, my 75S-3A receiver,
and my 32S-3 transmitter as well as on both 516F-2
power supplies.  Yes, things should be safety grounded
through the 3-wire plugs.  But, not all houses are
wired correctly, have had ground wires come loose over
the years, etc.  As such, I do not rely on those for
either a safety or r.f. ground.  

An r.f. ground is different from a safety ground which
is different from a lightning protection ground in how
they need to be connected.

Glen, K9STH


--- David Knepper <cra at floodcity.net> wrote:

Nothing special to worry about since the coax braid is
grounded - we assume by the operator in his shack.  It
is rather a redundant connection.

=====
Glen, K9STH

Web sites

http://home.comcast.net/~k9sth
http://home.comcast.net/~zcomco


	
		
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