On 5/6/06, Randy Russe3ll <lord_russell53@yahoo.com> wrote:
... I guess when you have a 1 ft. wide sheet
of copper for RF useage, it has the same useable
conducting area as if you rolled that one foot
circumference into about 4" inches wide. So it is
effectively the same RF conductor as a 4" dia. piece
of copper wire, yes? with lower inductance? Since RF
only utilizes the surface of a wire conductor.
Yes, a 4" tube of copper flashing is the same at RF as a 4" solid rod,
because of skin effect. But a 12" flat strap is probably twice as good
(half the impedance), because current flows on both sides. No RF current
flows on the inside of the tube.
On the other hand, a 4" bar is a lot less likely to explode or blow away!
73 Martin AA6E
--
martin.ewing@gmail.com - AA6E@arrl.net
President, Yale University Amateur Radio Club - W1YU
http://blog.aa6e.net
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