- 137 MHz QHF Quadrifilar APT Antenna
- This version of the 135MHz quadrifilar antenna for APT reception is an adaptation from Bill Sykes and Bob Cobey's article Taming the QFH which appeared in the March 1997 RIG magazine.
[ Hits: 6091 | Votes: 31 | Rating: 5.20 ]
- Quadrifilar Helix antenna for 436 MHz
- This is an antenna that author just built. Was intend for receiving the AO-27 downlink (at 436.800 +/- doppler). It is built with right hand circular polarization, and the gain is supposed to be in the neighborhood of 3 DB.
[ Hits: 3329 | Votes: 2 | Rating: 4.50 ]
- Quadrifilar helicoidal calculator
- Calculate design for a quadrifilar helicoidal antenna
[ Hits: 1818 | Votes: 8 | Rating: 6.75 ]
- Quadrifilar Helix Antennas
- The purpose of this page is to provide information and links about Quadrifilar Helix Antennas. It's the best antenna to use for APT satellite reception
[ Hits: 5291 | Votes: 5 | Rating: 4.60 ]
- QFH antenna for weather satellite band
- This article describes how to make a quadrifilar helix (QFH) antenna easily, from inexpensive materials: uPVC plumbing pipe and RG-58U co-axial cable
[ Hits: 3946 | Votes: 16 | Rating: 5.25 ]
- A quadrifilar helix weather satellite receiving antenna
- This article describes how to make a quadrifilar helix (QFH) antenna easily, from inexpensive materials: uPVC plumbing pipe and RG-58U co-axial cable.
[ Hits: 15595 | Votes: 9 | Rating: 7.12 ]
- LNA & Quadrifilar helix for GPS
- From a S53MV, Matjaz Vidmar, project
[ Hits: 1269 | Votes: 5 | Rating: 5.80 ]
- The Quadrifilar Helix Antenna
- Article about quadrifilar helix antennas, electrical and physical characteristics, difference between quadrifilar and conventional helix antenna
[ Hits: 1795 | Votes: 3 | Rating: 9.33 ]
- Helix Antenna for 137 MHz
- A Quadrifilar Helix Antenna for 137 MHz By George Goodroe, KF4CPJ
[ Hits: 1947 | Votes: 5 | Rating: 3.40 ]
- Quadrifilar Helical Antennas
- A page dedicated to the Quadrifilar Helical Antennas, with projects, pictures and antenna plans by OH2GVB
[ Hits: 610 | Votes: 1 | Rating: 1.00 ]
- Quadrifilar helicoidal antenna
- Design your own quadrifilar helix, the site even generates a drilling pattern in a PDF file. Several different construction methods are shown.
[ Hits: 5540 | Votes: 14 | Rating: 6.64 ]
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