In article , Gerald Miller says...

IIRC there used to be a special antenna wire - 12-14 gage steel with a
heavy copper coating. I seem to recall that it was close to square in
cross section. It is close to 60 years since the tree supporting the
outboard end this antenna fell, so I won't guarantee the veracity of
this memory.

Yep, that's called "copperweld." Steel core, copper over the
outside.

The next best thing is hard-drawn copper telegraph wire, from
the abandoned lines by the train tracks.

Er, or so they say....

Jim


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