Physical strength is probably the main factor. I successfully ran
1500 watts into an inverted V made of a single conductor from of
WD-1A field wire. I believe it is slightly larger than 20 AWG. It
has four tinned copper strands and three steel strands for strength,
along with some *very* tough insulation. I've had no problems with
this. I used this wire because it is strong and relatively light
weight. It was an inverted V at the top of a 25 foot fixed aluminum
mast sticking out of a 75 foot tower. I needed relatively small,
light wire as big stuff would have broken or bent the mast. In the
past I have run similar power into inverted V antennas using all
copper wire of similar or smaller size, but wire breaking in storms
was a problem.
Paul N1BUG
On 12/02/2017 05:00 PM, Gary Slagel via TowerTalk wrote:
I'm hoping to get to Belize to work ARRL DX CW contest this year and I'd like to
take my Elecraft KPA500/KAT500 and operate 500 watts. I will be at a friends
house and not next to the ocean so I'm thinking of getting a doublet up in the air
as far as I can on a fiberglass pole, feeding with 450 ohm ribbon and tuning it on
10 thru 40 and maybe 80M.
The fiberglass pole won't take too much weight so I'd like to go as small as I can on the
wire. Any suggestions or input?
Thanks, Gary KT0A
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