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7 links

Antennas : 20M : 20 meter Dipole Antennas

  • 20m mini dipole antenna - This antenna project is a compact center-loaded wire-dipole. Center-loading is the most efficient way of loading a dipole or mono-pole
    [ Hits: 1638 | Votes: 4 | Rating: 9.75 ]
Antennas : End-Fed
  • Multi-band End-Fed Antenna  new - An excellent guide to homebrewing multi band end-fed antennas. The article, embed several drawings including diagrams and detailed pictures, illustrating the basic funcionality of end-fed antennas. The author gives some basic hints on how to build a half size antenna for 80 40 to 10 meters and a 6 meter to 40 meter configuration. It is also well described how to build the impedance transformer and the loading coils for lower bands.
    [ Hits: 168 | Votes: 2 | Rating: 6 ]
Antennas : Theory
  • Currents in Standing-Wave Antennas - How can the current "flowing" out of the top of a mobile loading coil be greater than the current "flowing" into the bottom of the coil?
    [ Hits: 560 | Votes: 0 | Rating: 0 ]
Antennas : Vertical
  • Double T Bar Verticals - Double T Bar Vertical antenna are vertical antenna with cross bars on the top and bottom. These crossbars provide capacitance loading thus reducing the size of the antenna
    [ Hits: 767 | Votes: 3 | Rating: 6 ]
Operating Modes : Longwave
  • Antennas for 136kHz - Extensive article on building antennas for the 136 Khz band covering several aspects of antennas for the 136 kHz band including Vertical monopole antenna, Short vertical monopole, Vertical antenna with capacitive toploading, Umbrella antenna, Capacitive toploading of single-tower antennas and Spiral toploaded antenna
    [ Hits: 1492 | Votes: 7 | Rating: 6.7 ]
Software : APRS
  • USAPhotoMaps - Free Windows APRS Client with capability of downloading free aerial photo and topo map data.
    [ Hits: 1066 | Votes: 1 | Rating: 10 ]
Technical Reference : Amplifiers
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