On Sun, 14 Oct 2007 17:17:34 GMT, Bruce in Alaska
wrote:

Impedance of the RF Ground, is considerably MORE significant, than the
Resistance difference, between Tanished silver and Copper Foil, in
the Total RF Ground Impedance of the Antenna System.

No trouble believing that. Note that silver has ninety percent of the
electrical resistance, other things being equal. Thing is, there is no
reason why things should be equal. Make the copper foil ten percent
thicker and it will have the same resistance. I think a wide strap for
a conductor, to reduce inductance, would be helpful, but I don't
really know.

Casady