20 m vertical

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20 m vertical

130 links - and 2 categories

Antennas : 10M
  • 28 MHz Antenna Project - 10m Flowerpot Antenna, monoband half-wave vertical coaxial dipole antenna for 28 Mhz.
    [ Hits: 226 | Votes: 3 | Rating: 9.67 ]
Antennas : 20M : 20 meter Vertical Antennas
  • 4m Tall Vertical Dipole for 20m - Constructed in May 2008, this innovative 4m tall electrically full-size halfwave vertical dipole, tunable to multiple bands, offers HF coverage despite its space-saving design. Inspired by cost-effective DIY alternatives, the antenna design departs from conventional center-fed approaches, utilizing asymmetrical dimensions. Despite resonance challenges, the antenna's performance remains viable, boasting broad bandwidth and adaptability, as demonstrated through SWR measurements and EZNEC predictions.
    [ Hits: 65 | Votes: 0 | Rating: 0 ]
Antennas : 40M
  • 40m Wire Antennas Comparison - On the field comparison among C-Pole antenna, an EFHW vertical antenna and an Inverter V dipole antenna. Test is done using two identical WSPRLite beacons that transmit with 200mW on the WSPR frequency and analyzing spotted results.
    [ Hits: 170 | Votes: 1 | Rating: 3 ]
Antennas : End-Fed
  • Multiband portable wire antennas - Vertical end fed antenna used for portable operations. The antenna will work on 80 with acceptable results, it will work fine on 40m, and it will be a good deal better than a normal 1/4 wave GP on 20, 17, 15 meters.
    [ Hits: 186 | Votes: 0 | Rating: 0 ]
  • Delta Loop vs End Fed Half Wave on 20m - Intrigued by a German OM positive experience with a 20m delta loop, the author replicated the design, noting its favorable 50-ohm impedance compared to their 40m version. Testing against a vertical EFHW, the delta loop excelled within EU but lagged at longer distances. Despite needing more testing, the user leaned towards the EFHW for its overall performance and practicality.
    [ Hits: 123 | Votes: 0 | Rating: 0 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • Comparing Mobile whip versus EF HW Vertical - PH0NO conducted field tests comparing a mobile antenna (DX-UHV) to an end-fed half-wave wire. Results on 20m showed the end-fed wire outperforming the mobile antenna, with a significant difference in signal strength. On 40m, the end-fed wire surpassed the mobile antenna in spots and reach. While the mobile antenna is more practical, the end-fed wire offers superior performance. Further testing is planned.
    [ Hits: 81 | Votes: 0 | Rating: 0 ]
Antennas : Portable
  • The GAWANT Antenna - The GAWANT Antenna, or Shinagawa Antenna is an half-wave vertical end-fed in a FT817-friendly package
    [ Hits: 134 | Votes: 0 | Rating: 0 ]
Antennas : Vertical
  • 20-30m Vertical Antenna - Homebrew project for a vertical antenna with a coaxial-cable trap, that works on 20 and 30 meters band.
    [ Hits: 73 | Votes: 0 | Rating: 0 ]
  • Simple 3 band vertical antenna - The reason for making this antenna was the desire for a vertical (hence DX-ish) antenna that would cover at least 20m that would fit on my 5m fishing pole. This antenna can work on 20m 17m 15m bands and it is suitable for SOTA operations
    [ Hits: 155 | Votes: 0 | Rating: 0 ]
Operating Modes : Mobile
  • A Magic Ground Mobile Antenna - Experimenting and testing vertical antenna for HF bands on mobile operations.
    [ Hits: 113 | Votes: 0 | Rating: 0 ]

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