Mike, a different question than you asked, but if you have two trees or other
supports at 65 feet or greater and more than 130ft apart, I think an 80M dipole
strung between them will be a better all around antenna than a vertical. If you
can get to 80ft or 100ft the dipole was be markedly better. If you only have a
single support an inverted V will be almost as good.
This same antenna, you can tie the feed line together at ground level and feed
as a Marconi T against ground on 160M.
Back to your original questions:
As to differing bandwidth claims, they must be using slightly different
standards for bandwidth.
As long as you have more than a couple radials, I would not worry at all about
an asymmetrical radial field. Put down as much copper in whatever directions
you got. It's the guys with only 1 or 2 radials that have to worry about tuning.
Tim N3QE
> On Jun 12, 2017, at 11:29 PM, Mike Paskeuric <mikepask1@gmail.com> wrote:
>
> Hey Topbanders,
>
> I was looking to buy or make a mono type 80 meter antenna for DXing.
>
> I was wondering couple things. If I make a full quarter wave vertical WIRE
> in tree 65 feet tall and see DX Engineering verticals claim 65 foot tall
> but wider bandwidth. What is their secret or just advertisement?
>
> Second question, I understand more radials make vertical better, but what
> happens if one side half or one third the length radials due to space in
> yard are shorter by 20 to 30 foot? Is it noticeable enough to buy a
> vertical in middle of yard instead of wire in tree towards side of yard?
> Dollars verses radial lengths.
>
> Third and last question, can some of the radials, quarter of them,
> overlap with radials of another antenna (160M mono vertical Gladiator
> antenna)? Would it affect the performance noticeable.
>
> I don't need long answers, just something to help out a bit.
> Not sure what antenna to buy or make yet. I am in 2 and half acres and can
> maybe stretch in field next to me some with no one knowing. Not many 80M
> momo antennas to choose from.
> It is a late Summer or Fall project so time to think.
>
> Mike
> n0 odk
> 73
> thanks for suggestions gang.
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