df antenna

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df antenna

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Antennas : 160M
  • Magnetic Monster Loop Antenna for 160m - A monster magnetic loop antenna for 160 meters band. This Magnetic loop is optimized for 1840 Khz + 50 Khz. PDF Article published on La Radiospecola 10.22
    [ Hits: 837 | Votes: 2 | Rating: 10 ]
Antennas : End-Fed
  • 8010 Enfed Antenna - With this antenna the coverage is 80,40,20,15 and 10 meter band without any antenna tuner and the average SWR is below 1.2 on phone bands. The total antenna lenght is about 23 meters , with one 20.4 meters long segment from the 1:49 transformer to the 110uh coil and about 2.2 meters long segment from the coil to the insulator.
    [ Hits: 137 | Votes: 0 | Rating: 0 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • 1:49 unun for end fed half wave antennas - 1:49 UNUN using two stacked FT240-43 cores for end fed halfwave antenna. To match the end fed half wave antenna to the coaxial feeder, it is necessary to have a matching network or transmission line transformer.
    [ Hits: 386 | Votes: 10 | Rating: 8.1 ]
Antennas : Loop
  • Moebius style 80/40 m band antenna - A loop antenna for 80 and 40 meters band, the main loop is based by a crossed line using aluminium strip lines. The main loop diameter is 150 cm.
    [ Hits: 315 | Votes: 1 | Rating: 1 ]
Antennas : Portable
  • Foldable Yagi Antenna - A home made RDF 3 elements Yagi that can be used for fox hunting. The particularity of this antenna is that it can be folded, in order to save space while travelling. In Dutch.
    [ Hits: 235 | Votes: 1 | Rating: 10 ]
Antennas : Satellite
  • EggBeater Antenna for VHF UHF - This antenna was conceived mainly for high-speed digital transmission via satellite. The antenna is made of two full waves loops , mounted at right angles to each other. Then coupled together, 90 degrees out of phase over a horizontal circular reflector. With this configuration the antenna is omni directional and circularly polarized.
    [ Hits: 226 | Votes: 0 | Rating: 0 ]
  • The VHF UHF Eggbeater Antenna Revisited - A new, simple way to build the Eggbeater Antenna. This document introduces a new, simpler way to build the Eggbeater antenna. It also introduces a technically proper way to construct the Eggbeater antenna in order to achieve the best result.
    [ Hits: 523 | Votes: 4 | Rating: 6.5 ]
  • Eggbeater Mobile Antenna - The eggbeater antenna uses on mobile operations using the metal roof of the car as the reflector. The distance between the antenna and the roof as described in this article should be 1/8 lambda.
    [ Hits: 121 | Votes: 0 | Rating: 0 ]
Antennas : Spiral
  • Spiral Antenna for SDR - Designing and Testing a PCB Wideband Spiral Antenna. The 800 MHz+ and 300 MHz+ spiral antennas by Hexandflex
    [ Hits: 91 | Votes: 0 | Rating: 0 ]
Antennas : Towers
  • KD5RVX MicroVert Antenna - A Microvert antenna by KD5RVX based on the original microvert concept by DL7PE. PDF includes a 20 foot portable PVC tower project
    [ Hits: 442 | Votes: 0 | Rating: 0 ]
Technical Reference : Arduino
  • WIFI Remote FUCHS ATU for EndFed Antenna - The Fuchs Antenna tuner with a resonant circuit as a coupler. The Fuch Antenna Tuner is providing a high-efficiency compare to a 49:1 transformer using ferrite . The Fuchs tuner is a resonating L/C circuit to step-up the impedance from 50 Ohm to the required 3k. The ATU is able to perform automatic tuning with the addition of a tiny Aduino Nano and a SWR bridge.
    [ Hits: 114 | Votes: 0 | Rating: 0 ]

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