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

[Sam Morgan]

On Sun, 1 May 2005 13:55:42 +0000
Sam Morgan <ka5oai at qsl.net> wrote:

> On Sat, 30 Apr 2005 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/
> 
snip
Well after further research, including reading archives on the antenna-
discussion mailing list at antennex.com It seems There is a 2 part
article written back in 1999 I think?? called "THE ISOTRON REVEALED"
By Dave Cuthbert, KX7G these are considered a MUST READ for anyone
considering running an isotron antenna. 

Overview of my reading follows:
Is it a dummy load?
Perhaps

Is its radiation strictly a component of the grounded mast of this "
ground independant/required" (say what?) antenna?
Perhaps

Does it really work?
Depends on how it's grounded, feed, and where it is mounted...
and if you read those 2 articles and understand how it works...

References:  
http://guests.antennex.com/rooms/stones/st1002/compact.htm
http://guests.antennex.com/rooms/stones/st1102/evolve.html
http://www.google.com/search?hl=en&q=isotron+%2Bantenna&btnG=Google+Search

Sam Morgan
KA5OAI
mailto:ka5oai at qsl.net