On Wed, 26 Nov 2008 13:52:08 +0000, Dave wrote:

Proximity effect isn't a factor unless conductors are very close

Thanks. Seems to be the realm of the esoteric however.

Esoteric? As an issue of loss, it is probably more common than
conductor shape, and is (unlike most of the scribblings here to this
group) decidedly on-topic and focused.

73's
Richard Clark, KB7QHC