You could use the 18 gauge insulated stranded CCS (Copper Clad Steel) wire that
Davis RF and The Wireman sell. The PE jacket is a matte black color and not
very visible from any distance away. It's pretty strong too, and not very
expensive. I use it a lot for wire antennas.
I'm amazed your 22 gauge wire is holding up for elevated radials! Especially
135 feet long! I would expect such small wire to break pretty quick used in
your application so I'm really surprised it's working for you.
Regarding the resistance, I doubt it would make much of a difference. I'd go
with larger wire more for strength than anything else. I use 18 gauge solid
copper for my own on-ground radials (but I have some 40(ish) of them).
-Bill
> I use 3 raised radials ~ 135 feet long of #22 ga. solid wire.
> used for dog perimeter control and is un-tinned copper
>
> covered with green plastic. The wire is about 11 feet high to keep it out of
> the way in the common property woods area of multi building condos and
> will be taken down when the weather starts to warm.
>
> The resistance of 135 feet of copper wire is:
> #22 ga. 2.18 Ohms
> #20 ga. 1.37 Ohms
> #16 ga. 0.5 Ohms
[snip]
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