On Mon, 09 Apr 2007 08:21:36 -0700, dansawyeror
wrote:

What coupling does this imply? Is it direct as is contact or is it a
field coupling as capacitive or inductive?

Hi Dan,

Yes to all three.

The question is: what would
insulation or corrosion due to buried radials?

Not much, practically; unless the wire is extremely thin, and the
currents are large. Loss is in the earth. You can, of course, build
a very crummy radial system if you try hard. For instance, using
expensive piano wire in place of cheap house wiring.

73's
Richard Clark, KB7QHC