Date: Sun, 5 Jan 2020 13:01:40 -0700
From: David Gilbert <xdavid@cis-broadband.com>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] 80M antenna wire size
<Both diameters are really, really small relative to a wavelength at
<80m.? After a point the effect of the differences isn't a big deal.
<The model is really simple ... just one straight wire fed in the
<middle.? If you trust EZNEC+ at all it's pretty difficult to mistrust
<that model.
<No, I can't explain why you saw an improvement in bandwidth with 10
<gauge wire on your 80m Inverted-V, but I'd be interested in what "much
<wider" actually was if you still have the figures available. One thing
<that does scale fairly linearly with diameter is capacitive coupling to
<surroundings.? Possibly (just speculating here) there was some resulting
<loading effect from that for your antenna.
<73,
<Dave?? AB7E
## dragged out old notes from eons ago. BW increased by 60-70 khz.
80m band.
The other 2 hams in town achieved similar results.
## I still have a 300M roll of RW-90 left..in 10 gauge. I use it for
other
applications than wire ants. I also have some RW-90, In green, 6
gauge.
## I found that 10 gauge , RW-90, was robust to handle snow + ice
loading.
When I used to live 400 miles further north, the heavy wet snow
was so thick,
wire ants looked like 2 lb coffee cans nose to tail. Like 4-6
inches in diam.
That would cause severe stretching with smaller gauges. On 160m full
sized dipoles
that some of the folks had up 100 ft, 8 gauge was the minimum size
used...and even that
stretched.
## RW-90 was readily available, so we used it.
Jim VE7RF
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