[Antennas] Isotron antenna <was> Re: 40m mobile antenna e.r.p. compared

Sun May 1 09:55:42 EDT 2005

On 2005年4月30日 22:39:04 -0500
Gary Pewitt <n9zsv at cei.net> wrote:
>> > Try an Isotron antenna as advertised in QST. They are a balanced antenna 
> > which means you don't need any radials. 
>http://www.isotronantennas.com/
Impressive alternative idea Gary, tnx.
http://www.isotronantennas.com/8040b.htm
covers 2 bands
less than 1/2 the price of some of the ones I was considering
PRICE: 177ドル.90
more broad banded than the verticals
3.5 - 4.0 Mhz.
7.0 - 7.3 Mhz.
low profile/managable size for 80m and 40m
32" x 16" x 30" weighs 10lbs.
no radials needed
no tuner needed .. 
50 - 75 ohms feedpoint
well not in the sense the verticals wound require
(to tweak the band edges perhaps.)
-----
On 2005年4月30日 20:59:25 -0700
"Hue Miller" <kargo_cult at msn.com> wrote:
> That you could work out on 20 up does not surprise me at all, but i am 
> curious how this small antenna worked on 40 and goodness, even 80.
> I suspect quite a bit like a mobile whip at those freqs. 
>good questions
some research, head scratching, and reading is a definate must
starting here I guess:
http://www.isotronantennas.com/isohow.htm
other comments anyone? 
Sam Morgan
KA5OAI
mailto:ka5oai at qsl.net