df antenna

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df antenna

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Antennas : 6M : 6 meter Yagi Antennas Antennas : 80M
  • A Horizontal loop for 80 meter dx - This 80-meter quad loop system requires only supports of modest height a better single-element antenna may be hard to find
    [ Hits: 5459 | Votes: 4 | Rating: 5.50 ]
Antennas : Array
  • The 7-Hex Driven Vertical Array - The array consists of 7 vertical antennas arranged as 6 verticals in a hexagon shape plus 1 additional vertical in the center of the hexagon
    [ Hits: 1446 | Votes: 0 | Rating: 0.00 ]
Antennas : Dipole
  • Dipole Antenna Radiation Patterns - Much confusion exists about the radiation patterns of antennas. In particular, the horizontal dipole is misunderstood by most who use it.
    [ Hits: 1671 | Votes: 5 | Rating: 4.40 ]
Antennas : Helical
  • Multi-pitch Helical Antenna - Creating multiple, overlapping resonance at 700-800 MHz band and leaving the VHF part of the response as in ordinary, narrow band helical antenna.
    [ Hits: 1365 | Votes: 3 | Rating: 7.67 ]
  • Coaxial-feed axiam mode helical antenna - Coaxial-feed axial mode hemispherical antenna is studied experimentally and theoretically
    [ Hits: 1232 | Votes: 0 | Rating: 0.00 ]
  • Helical Feed Antennas - Helical antennas have long been popular in applications from VHF to microwaves requiring circular polarization, since they have the unique property of naturally providing circularly polarized radiation. Paul Wade W1GHZ
    [ Hits: 1594 | Votes: 2 | Rating: 3.00 ]
Antennas : Homebrewing Techniques Antennas : J-Pole
  • The DBJ-1 VHF-UHF Dual Band J-Pole - Searching for an inexpensive, high performance dual band base antenna for VHF and UHF ? Build a simple antenna that uses a single feed line for less than $10.
    [ Hits: 5692 | Votes: 5 | Rating: 6.00 ]
  • Folding J-Pole Antenna - Also known as the Backpacker's Delight Antenna. This Folding J Pole Antenna is the original design of Mike Heiler KA0ZLG and was featured on the Front Cover of the March 2005 QST Magazine.
    [ Hits: 6774 | Votes: 18 | Rating: 7.83 ]
Antennas : Loop
  • The 3-D Folded Loop Antenna - This article will introduce you to an antenna author call the 3-Dimensional Folded Loop. This antenna is the result of his continuing efforts to compact full-size antennas by folding and bending the elements. A one-wavelength loop that is reduced in height and width by being folded into three dimensions.
    [ Hits: 3551 | Votes: 1 | Rating: 1.00 ]
Antennas : Magnetic Loop
  • Magnetic loop for 30-10 M - A light and portable magnetic loop antenna with improved bandwidth and performance by HB9MTN
    [ Hits: 1562 | Votes: 0 | Rating: 0.00 ]
  • Antentop: Loop Antennas - Article on radiation patterns of small loops, equivalent circuits of loop antenna, small loops as receiving antennas, ferrite loops
    [ Hits: 1830 | Votes: 4 | Rating: 8.00 ]
Antennas : Portable
  • Homebrew Buddistick 2007 - W3FF article about the buddistick portable vertical antenna in a PDF file
    [ Hits: 5199 | Votes: 20 | Rating: 7.36 ]
Antennas : Theory
  • Verticals. Ground systems and some history - Article gives a good overview of the basics and reflects the accepted wisdom from BC antenna work.
    [ Hits: 1304 | Votes: 1 | Rating: 10.00 ]
  • Loop Antenna Basics - Loop Antenna Basics and Regulatory Compliance for Short-Range Radio
    [ Hits: 649 | Votes: 0 | Rating: 0.00 ]
Antennas : Vertical
  • Coax Monopole antenna - OE1MWW monopole antenna made with common RG 58 or RG 213 coaxial cable
    [ Hits: 3176 | Votes: 3 | Rating: 6.67 ]
Antennas : Windom
  • Comparison of two windom antennas - The antenna comparison being reported was between a commercial Chelcom 136ft multi-band windom designed for 80m to 10m and a home brew 260ft full size windom designed for 160m to 10m by G0VVN, G3KAU and G3GRO
    [ Hits: 4683 | Votes: 1 | Rating: 2.00 ]
Technical Reference : Grounding
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