On Wed, 18 May 2005 19:30:50 GMT, "harrogate2" wrote:


"Cecil Moore" wrote in message
...
Chris wrote:
?
In the upper peninsula of Michigan the Navy operated an ultra low frequency
station in order to send messages to submerged submarines. The transmitting
antennas were dozens of miles long.

JJ


Ariceibo?
--
73, Cecil http://www.qsl.net/w5dxp


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As a single antenna, probably.

But as an 'effective' antenna what about that line of dishes on tracks
near Cambridge that ISTR is equivalent to a dish 3 miles across!

James Johnson
remove the "dot" from after sail in email address to reply

Chris didn't write:
Biggest antenna ever constructed?

Maybe http://www.naic.edu/public/the_telescope.htm ?

73,
--
Fabian Kurz, DJ1YFK * Dresden, Germany * http://fkurz.net/

Fabian Kurz wrote:

Chris didn't write:

Biggest antenna ever constructed?


Maybe http://www.naic.edu/public/the_telescope.htm ?


Or maybe this one:

http://www.haarp.alaska.edu/

ac6xg

Jim Kelley wrote:


Fabian Kurz wrote:

Chris didn't write:

Biggest antenna ever constructed?



Maybe http://www.naic.edu/public/the_telescope.htm ?


Or maybe this one:

http://www.haarp.alaska.edu/

ac6xg

Pine Gap is one of the largest , 26 Dishes , but its a spook thing.

atec wrote:


Pine Gap is one of the largest , 26 Dishes , but its a spook thing.

Sounds like they collected the whole set!

ac6xg
Beware of the Antennaphobes

Well, it wasn't meant as an antenna, but the eiffel tower was once used as an antenna: \a href="http://www.antenna-theory.com/intro/fun.php"Antennas\/a

The Moon

Amateurs use it frequently as a passive reflector

Constructed about 4.5 billion years ago

Builder GØD

--
CL -- I doubt, therefore I might be !






"Chris" wrote in message
...
?

Caveat Lector wrote:

The Moon

Amateurs use it frequently as a passive reflector

Constructed about 4.5 billion years ago

Builder GØD


God must have missed a design principle in electromagnetics. The moon is
a convex surface more suited to scattering than concave which is more
suited to focusing ... or is it the other way around?

On Wed, 18 May 2005 18:42:43 -0400, Ham op wrote:
The moon is
a convex surface more suited to scattering than concave which is more
suited to focusing
Aim for a big crater.

On Wed, 18 May 2005 19:17:01 +0100, "Chris" wrote:

For a single antenna located at a single site, maybe NAA at Cutler,
Maine. I've seen this at it is awesome. WWVL was pretty awesome too.

However, some of the ELF stuff is much bigger. I heard that there was
(is) one on the UP of Michigan that is underground, so who knows how
big it might be. The tree huggers kept cutting down the poles that
supported the above ground versions.

If you're talking height then it's KVLY's tower. 2063', the tallest
manmade structure on the planet

http://www.kvlytv11.com/info_tower.html

Been there too.