SV: [Elecraft] bonding of grounding systems

Mike Harris mike.harris at horizon.co.fk
Thu May 27 20:41:36 EDT 2004


G'day,

<quote>
A round conductor has the greatest surface area for volume and RF flows
only
on the surface. So it has the lowest resistance at RF.
<unquote>

Can't say I agree with that.  I would suggest it is the complete opposite.
A sphere has the greatest enclosed volume for a given surface area and
this would logically follow for the area enclosed within an infinitely
thin section of that sphere or a cross section of a round conductor.

A 10mm round conductor has a cross sectional area of 78.54mm^2 and 31.42mm
circumference.
A 15.21mm x 0.5mm flat strip has a cross sectional area of 7.61mm^2 and
31.42mm circumference.

A wide but thin flat strip conductor with very little volume has a very
big surface area to volume ratio and represents better material
utilization value for conducting skin currents.

Regards,

Mike VP8NO
#1400



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