short wave antenna

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short wave antenna

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Antennas : 160M
  • Short antennas for 160m - Often it is not possible to erect a full quarter wave verticals, especially on 160m or even more so at 600m. In this article N6LF illustrate some ideas.
    [ Hits: 1135 | Votes: 1 | Rating: 10 ]
Antennas : 2M
  • Squarooka Antenna - squared bazooka for 2 meters band - Sort of similar to the one of the 6m omni. Instead of using twin-lead, this design makes use of a more or less regular double bazooka antenna (coaxial dipole). Your attention shall be drawn to the available standart literature, such as Rothammel. In order to "compute" the dimension, Karl Rothammel mentioned that the total length of the dipole shall be 95% of the free-space wavelength. The short-circuit bridges (closing the folded dipole) are to be placed at a distance-fraction being equal to the velocity factor of the coax cable used, which will be 66% using RG-58 or RG174.
    [ Hits: 353 | Votes: 0 | Rating: 0 ]
Antennas : 80M
  • Shortened 80m Antenna - An antenna for 80 meters band for those who does not have enough space to setup a halwave wire dipole that is aprox 130ft or 40 meters. The antenna is an open-wire-fed shortened dipole
    [ Hits: 420 | Votes: 1 | Rating: 1 ]
Antennas : Bazooka
  • The Double Bazooka Antenna - A Review - Here is a review of the 40 and 80 meter band Double Bazooka antennas as used on the HF shortwave bands.
    [ Hits: 1128 | Votes: 4 | Rating: 5.5 ]
Antennas : Beverage Antennas : Dipole
  • The Short Dipole - There are several ways to reduce the length of a dipole and still use it as an effective antenna. Remember it is the electrical length that determines resonance. The physical length can be considerably less than a half wave length on your desired frequency as determined by 468/f MHz.
    [ Hits: 202 | Votes: 0 | Rating: 0 ]
Antennas : EH
  • DL7AHW Spraycan EH Antennas - Hairspray-can EH Antennas for shortwave and online programs. Small magnetic (H) antennas (Loops) have a good efficiency for the upper bands (20/15/10 meter band) and also in contrast to E-antenna a defined radiation direction.
    [ Hits: 310 | Votes: 2 | Rating: 8.5 ]
Antennas : Installation
  • Broadcast Antennas on Buildings - When a broadcast antenna is to be placed on top of a building, there are special problems of feeding and grounding. The radiator is usually electrically short, that is, much less than one-quarter wavelength high.
    [ Hits: 358 | Votes: 2 | Rating: 10 ]
Antennas : J-Pole
  • Construction of a J-Pole antenna for 2 meter - If you like building good antennas, this one is for you. The J-pole is a slim, omnidirectional, half-wave antenna fed at the end through a quarter-wave shorted transmission line. Its predecessor is the famous Zepp antenna developed for the Zeppelin airship.
    [ Hits: 381 | Votes: 2 | Rating: 10 ]
Antennas : Magnetic Loop
  • HF Resonant Loop Antenna - The antenna was built to be used for shortwave listening with a Tecsun PL-660 radio receiver. Later it was used with Yaesu VX-6 handheld transceiver and with Yaesu FT-817ND for shortwave listening.
    [ Hits: 1035 | Votes: 3 | Rating: 9.67 ]
Antennas : Microwave Antennas : Portable
  • Portable Vertical Antenna - A home made portable vertical antenna, that with a single 1/4 wave counterpoise wire is possible to achieve less than 1.5:1 SWR on 40, 30, and 20 meter bands. It is basically a center load, shortened ground plain vertical antenna.
    [ Hits: 362 | Votes: 0 | Rating: 0 ]
Antennas : Shortwave
  • Mini Whip Antenna - An Active antenna designed for VLF and shortwave radio reception. A small antenna capable of excellent performances on low bands, made on a copper plate and introductio to active antennas.
    [ Hits: 2284 | Votes: 2 | Rating: 6.5 ]
  • Shortwave Antennas - Introduction to Shortwave Antennas. Understanding Shortwave Radio Listening and Antenna Design and Construction
    [ Hits: 723 | Votes: 1 | Rating: 10 ]
  • Curtain Antenna - An antenna for shortwave radio broadcasting consisting of rows and columns of dipoles, is a high gain directional antenna, designed for medium and long range communications.
    [ Hits: 854 | Votes: 0 | Rating: 0 ]
Antennas : T2FD
  • Attic T2FD SWL antenna - Using the T2FD antenna for shortwave listening by AB1KW
    [ Hits: 2386 | Votes: 3 | Rating: 3.33 ]
Manufacturers : Antennas : HF : Active antennas
  • Broadband Power Technology - Active Receiving Antennas, designed for reception of shortwave, mediumwave and longwave signals and VHF/UHF signals
    [ Hits: 337 | Votes: 0 | Rating: 0 ]
Manufacturers : Antennas : VHF UHF Microwave
  • Omnitec Antennas - Antennas for Amateur Radio and short wave listening
    [ Hits: 257 | Votes: 0 | Rating: 0 ]
Propagation : NVIS Propagation
  • NVIS Propagation - Near Vertical Incidence Skywave propagation is a form of radio wave propagation used on the MF and HF bands to provide radio communications and broadcasting coverage over short distances, especially where the terrain contains obstacles.
    [ Hits: 446 | Votes: 1 | Rating: 10 ]
Technical Reference : Receivers
  • A 3.5MHz Receiver for SSB and CW - Homemade receiver for 80 meters band. The receiver works very well (in fact better than some of its successors), especially the AGC makes listening to 80m QSOs a real pleasure. Sensitivity is not cutting-edge, but on a full-size short-wave antenna it is by fare sensitive enough.
    [ Hits: 248 | Votes: 2 | Rating: 6.5 ]

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