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J. B. Wood December 4th 08 11:31 AM

Reflector mesh surface
 
In article , John Smith
wrote:

Cecil Moore wrote:
Art Unwin wrote:
7 inches of snow with two more clippers on the way has put a crimp in
my immediate plans


Hmmmmm, I don't seem to have that problem here in
East Texas. Y'all come on down.


We have heard rumors of that stuff here in California ... ;-)

Regards,
JS


Yeah, and in Texas you get other stuff on your boots instead of snow ;-))
Sincerely, (hey I voted for that Texan who got to be POTUS),

John Wood (Code 5550) e-mail:
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337

Cecil Moore[_2_] December 4th 08 12:17 PM

Reflector mesh surface
 
John Smith wrote:
At a certain ratio of capacitance to inductance, in the design of an
antenna, that "magical/mystical value" of 477 ohms would be reached.


Rumors are that California is in a different universe.
Guess that "477 ohms" proves it. :-)
--
73, Cecil http://www.w5dxp.com

Cecil Moore[_2_] December 4th 08 12:21 PM

Reflector mesh surface
 
J. B. Wood wrote:
Yeah, and in Texas you get other stuff on your boots instead of snow ;-))


Have you seen the "Ski Texas" poster? A guy skiing
down a pile of cow paddies. :-)
--
73, Cecil http://www.w5dxp.com

John Smith December 4th 08 05:38 PM

Reflector mesh surface
 
Art Unwin wrote:

...

On the other hand this 477 ohms figure certainly is mystical to me,
what is the point you
are trying to make? Is it possible that the figure you are using is
bigger than you intended
by being larger than life itself


Oh, I WOULD propose that 477 ohms is "real"; indeed, it as real as
gravity. That is the ONLY reason you would find it in antenna
calculations and mentioned in books ... however, you are quite correct,
it seems it only serves as a "placeholder" and as a "magical
number"--its' only purpose, to make equations and assumptions work which
would otherwise not ... what that 477 ohms "really is", is the crux of
an important omission/guess/fudge-factor/etc.

...
All the above is material that you can use in your determination if I
am of sane mind or not. But first you must set your mind free
accepting only that which you can personally derive from first
principles as something that can be built upon.

Brrrrr it is geting cold
Goodnight
Art


Art, I believe you sane enough, you simply "poke at matters" which are
taboo ... and, I am loathe to be more specific. You either see the
discontinuities which prevent "the picture from being complete", or you
do not. If I felt I could go even further out on a limb, I would. For
now there are only questions and a search through others thoughts ...

Regards,
JS

John Smith December 4th 08 05:40 PM

Reflector mesh surface
 
Cecil Moore wrote:

...
Rumors are that California is in a different universe.
Guess that "477 ohms" proves it. :-)


Your point being well taken, I can only reply, "477 ohms can ONLY be as
important as the equations which depend upon it to function."

Regards,
JS

John Smith December 4th 08 06:07 PM

Reflector mesh surface
 
Cecil Moore wrote:
John Smith wrote:
At a certain ratio of capacitance to inductance, in the design of an
antenna, that "magical/mystical value" of 477 ohms would be reached.


Rumors are that California is in a different universe.
Guess that "477 ohms" proves it. :-)


Oh gawd, you got me 377 (it exists in my calculator as a variable "fs"
(or "free space"), I seldom enter it from a keyboard) ... its'
computation given he

http://whatis.techtarget.com/definit...845268,00.html

I do that, yanno'? :-(

Regards,
JS

Cecil Moore[_2_] December 4th 08 06:14 PM

Reflector mesh surface
 
John Smith wrote:
Cecil Moore wrote:
Rumors are that California is in a different universe.
Guess that "477 ohms" proves it. :-)


Your point being well taken, I can only reply, "477 ohms can ONLY be as
important as the equations which depend upon it to function."


Dang John, you missed the point. In the free space
that exists in my universe in Texas that figure is
376.73031346177... ohms.

Is 477 ohms the Z0 of free space in the land of
fruits and nuts? :-)
--
73, Cecil http://www.w5dxp.com

John Smith December 4th 08 06:30 PM

Reflector mesh surface
 
Art Unwin wrote:

...
Brrrrr it is geting cold
Goodnight
Art


To get us closer to being on the same page:

http://www.physlink.com/Education/askExperts/ae674.cfm

Says it better than I ever could.

Regards,
JS

John Smith December 4th 08 06:35 PM

Reflector mesh surface
 
Cecil Moore wrote:

...
Dang John, you missed the point. In the free space
that exists in my universe in Texas that figure is
376.73031346177... ohms.

Is 477 ohms the Z0 of free space in the land of
fruits and nuts? :-)


Cecil:

LOL!

I was slow on the uptake, sorry old man ... :-(

I know that is a terrible sin here, one I make too frequently ... you
got me! I punched [1 x "fs"] into the calculator, got the ~377 and
immediately recognized my error ... just gettin' old and slow here ...

It was wise of you to make a point of it ... thanks!

Regards,
JS

Art Unwin December 4th 08 06:49 PM

Reflector mesh surface
 
On Dec 4, 11:38*am, John Smith wrote:
Art Unwin wrote:

* ...

On the other hand this 477 ohms figure certainly is mystical to me,
what is the point you
*are trying to make? Is it possible that the figure you are using is
bigger than you intended
*by being larger than life itself


Oh, I WOULD propose that 477 ohms is "real"; *indeed, it as real as
gravity. *That is the ONLY reason you would find it in antenna
calculations and mentioned in books ... however, you are quite correct,
it seems it only serves as a "placeholder" and as a "magical
number"--its' only purpose, to make equations and assumptions work which
would otherwise not ... what that 477 ohms "really is", is the crux of
an important omission/guess/fudge-factor/etc.

...
*All the above is material that you can use in your determination if I
am of sane mind or not. But first you must set your mind free
accepting only that which you can personally derive from first
principles as something that can be built upon.


Brrrrr it is geting cold
Goodnight
Art


Art, I believe you sane enough, you simply "poke at matters" which are
taboo ... and, I am loathe to be more specific. *You either see the
discontinuities which prevent "the picture from being complete", or you
do not. *If I felt I could go even further out on a limb, I would. *For
now there are only questions and a search through others thoughts ...

Regards,
JS


John,
my first point was the 477 error but you didn't catch on.No problem
Regarding taboo. When the gloves are taken off then every thing
goes !.
The first person to fire does not make the rules for what then ensues.
When a animal kicks you in the crotch then there is a good chance it
has rabies
and you do what you have to do,. Ofcourse you can run away but then
that
would be very painful and lasts a life time. Let it drop
My very best regards
Art Unwin KB9MZ.......xg


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