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Dave[_15_] · April 18th 08, 01:57 PM posted to rec.radio.shortwave

RHF wrote:
On Apr 17, 5:33 am, RHF wrote:
On Apr 17, 2:44 am, "Burr" wrote:

- - Would somebody tell me why would a
- - "Inverted" "L" be better then a "Sloping" "L"
- -
- - Burr's Radio Shack -http://tinyurl.com/3wuscn
- -
- - Red Mountain, California / Bulacan, Philippines

- Burr - The "L" If I Know ! ;-} ~ RHF
- .
- -ps- tdmmdi

Burr,

READ - The Shortwave Radio Listener (SWL) :
Sloper Antenna -versus- Inverted "L" Antenna : The 3:4:5 of It !
http://groups.google.com/group/rec.r...7f982be7601f51

Basically your Sloping "L" Antenna -if- You start with an
Inverted "L" Antenna using a Ground Rod at the base of
the "L" with a 9:1 Matching Transformer and Coax Cable
feed-in-line.

Then Drop the Far-End of the Horizontal-Out-Arm so that
it is at or near the surface of the Ground.
-or- At Least a 30 Degree Angle of Slope from the Apex.
[ Angle between the Vertical and Sloping Wires is 60
Degrees or less. ]

You then have created your Sloping "L" Antenna.

For some frequencies related to the Length of the
Vertical-Up-Leg : 1/8WL, 1/4WL, 1/2WL 1WL . . .
You have an Omni-Directional Antenna Element.

For some frequencies related to the Length of the
Sloping Section : 1/8WL, 1/4WL, 1/2WL 1WL . . .
You have a Directional Antenna Element favoring
the direction of the Far-Down-End.

For most frequencies NOT related to the Length of the
Vertical-Up-Leg and Sloping Section : You will have a
Directional Antenna with a Heart Shaped {Cardioid}
Antenna Pattern that favors the direction of the
Far-Down-End of the Sloping "L" Antenna.

Know this about your Sloping "L" Antenna : You Should
Point It's Far-Down-End Toward the Direction of Interest.

IIRC - Somewhere It's In There* . . .
Antenna Models - 2nd Edition -by- L.B. Cebik [W4RNL]
http://www.antennex.com/Sshack/collect.htm
-ps- take it easy -or- you will nec yourself ;-}
EZNEC NEC - http://www.eznec.com/
-by- Roy Lewallen [W7EL]
--pps-- go ahead and nec yourself :-))
* -or- More Antenna Analysis Software . . .
http://www.dxzone.com/catalog/Softwa...enna_analysis/

it don't take a rocket scientist - iane ~ RHF {pomkia}
.
Are You Interested in building a better Shortwave Listening*
(SWL) Antenna ? {SWL Group} = http://tinyurl.com/ogvcf
GoTo = http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
RHF's Standard "Shortwave Radio Listener (SWL) Antennas Group"
Reference Message Signature-Line = http://tinyurl.com/25zbrg
http://groups.google.com/group/rec.r...1dac3b4a1798e0
.
* Remember 55.5% of Shortwave Radio Listening (SWL)
is the Shortwave Antenna =http://tinyurl.com/ogvcf
.
RHF's Radio Shack in Twain Harte, California -USA-
SHACK INFO =http://tinyurl.com/2skmxm
Shortwave Radio / Receiver and SWL Antenna Info
.
-=2SKMXM=-
-=25ZBRG=-
SWR3:SWL:INFO
.
Learn ****ing punctuation, please.

Your prose is an insult.