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Old August 27th 03, 04:22 AM
RHF
 
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Paul,

ON-POINT: For your USB 11.175 MHz a Half Wave Dipole (HWD) is a good
antenna but requires a specific length and height for a small band of
frequencies and for those frequencies is very directional.
* These facts limit the HWD's application as a good overall for the
other group of frequencies 5-9 MHz (USB).
* You could construct a Dual-Band HWD or Tri-Band HWD Antennas to try
and cover these three SW bands.
* Usually Multi-Band HWD Antennas are 'cut' for the lowest frequency
(longest/largest size).
* A type of HWD that uses a single center support with two slopping
legs is call the Inverted "V".
NOTE: The commercial antenna that goes by the Brand Name of "Alpha
Delta" Model "DX Ultra" (80Ft Long / 20-30Ft Center / 5-10Ft Ends) is
a Tri-Band Inverted "V" Antenna.
http://www.google.com/search?hl=en&i...=Google+Search


FWIW: You may wish to consider the a simple basic antenna that
incorporates the Low Noise Antenna Design Concepts a la John Doty.
http://groups.yahoo.com/group/SWL-AM...enna/message/2

The best shape antenna that lends itself to the Low Noise Antenna
Design is the Inverted "L" Antenna.
http://groups.yahoo.com/group/SWL-AM...nna/message/10

The Inverted "L" Antenna can be erected at any average Height 15-45
Feet and for any reasonable Length 30-135 Feet to fit your land and
space limitations. When constructed well using a matching transformer
and ground; they can give good omni-directional coverage across the
LW, AM/MW, and SW Bands.


~ RHF
..
..
= = = "Paul"
= = = wrote in message ...
Would an antenna like the one in the link be any good? I am looking for a
decent shortwave antenna. I mainly listen to 11.175 USB and 5-9mhz USB.

http://www.radioshack.com/product.as...Fid=278%2D1374

Any advice would be helpful.

thanks,

Paul

 
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