RadioBanter - View Single Post

October 21st 04, 07:14 PM

wrote in message
news:bMDdd.293802$3l3.275124@attbi_s03...

"Chuck" wrote in message
news:XrBdd.8254$6P5.7645@okepread02...
snip.

I'm not sure if I follow this correctly...
please elaborate further.

Certainly
To attain maximum gain per unit length the model dimensions
were all variables as was the number of elements. Not only
was the driven element current often less than another element in the array
it was sometimes found that the maximum current element required a diameter
of a few thousanths that was not sufficient to carry 1Kw.!
Obviously the gain attained was over ruled by the inability of the element
to meet operational requirements.
I might add that I use fibre fishing rods for my antennas where I can apply
the correct
wire diameters ( or aluminum foil) to an array without being encumbered by
mechanical restrictions.
This removes me from the normal restrictions applied to antennas where
element diameter
is pre-controlled for mechanical reasons which often conflict with
scientific requirements
The above statement does conflicts with your assesment stated above
regarding critical coupling
but this is what I found and I will leave it at that
Regards
Art.

Hi Art,

Ok, I'm always open minded to learn
something new...

I'd like to establish a few things, though.

First of all, what modeling program are
you using?

Is your empirical data consistent with
the models?

How are you ascertaining your empirical
data?

How are you determining the current
amplitudes: By model? Or empirically?

And what are the machinations that
demand ultra-thin wires to establish
the gain?

You can email me if you care to not
discuss these things in an open forum.

73, de Chuck, WA7RAI
wa7rai at cox dot net