On Sat, 22 Apr 2006 12:18:43 -0700, wrote:

On 22 Apr 2006 11:46:13 -0700, "RHF"
wrote:

The Slim Jim Antenna
http://www.hamuniverse.com/slimjim.html

The Slim Jim is a Vertically Polarized Omni-Directional End-Fed
Antenna having considerable gain and this is concentrated almost
parallel to ground toward the horizon rather than skyward making
it more efficient than a ground plane type antenna by about 50
percent better.
http://www.hamuniverse.com/2meter300ohmslimjim.html

Due to it's SLIM {Very Thin Shape} used in it's Design,
there is very little wind loading. It is fed with 50 ohm coax.
http://www.ee.washington.edu/circuit...ntennas/slim_j

It uses a 'J' type Matching Stub (J Integrated Matching = JIM),
http://www.pcs-electronics.com/en/gu...p?sub=antennas

Hense the name SLIM JIM.
http://en.wikipedia.org/wiki/Slim_Jim_(antenna)

Credit for the original design goes to F.C. Judd [G2BCX].
http://www.ee.washington.edu/circuit...ntennas/slim_j

How to make a Weatherproof Vertically Polarised Omni-Directional Aerial
http://www.irational.org/sic/radio/omni-aerial.html

Choosing the Correct Antenna
http://www.marcspages.co.uk/tech/antchose.htm
Marc's Technical Pages
http://www.marcspages.co.uk/tech/index.htm

So could I make one of these Slim Jim Antennas
for the Shortwave 49 Meter Band ? ? ?
and just how Thin-and-Tall would it be ? ? ?

What About the "Slim Jim" Antenna ?
http://groups.yahoo.com/group/Shortw...a/message/9180


obtw - too fat to be called 'slim' and my name ain't 'jim' ) a- iane
~ RHF
.
.

The Slim Jim is another name for a J-Pole from everything I read about
it. This is a 1/2 wave antenna over a 1/4 wave matching section so
your 49 meter band antenna would be rather tall (about 37 meters).
Sure, you could make it ......... would be interested to see your
plans for installing it 8-}

Howard

RHF - forgot to mention that the claimed 6dB gain (in relation to a
5/8 wave antenna) is rather bogus.