4m vertical

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4m vertical

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Antennas : 20M

  • 20m delta loop  pop - This antenna is fed for vertical polarisation, to give a low angle of radiation for DX and also a nearly omni-directional radiation pattern.
    [ Hits: 65707 | Votes: 69 | Rating: 6.71 ]
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 : 4M
  • Vertical half-wave aerials for 4m - Practical designs pictures and alternative design of antennas for 70 Mhz by Ross Wilkinson G0WJR
    [ Hits: 8418 | Votes: 16 | Rating: 5.12 ]
  • A comparison of commercial 4m verticals - Ian Hogan G6TGO has recently tried out two different commercially-built vertical aerials for 4m, and has prepared this article to share his findings with us.
    [ Hits: 1133 | Votes: 0 | Rating: 0 ]
  • 6m and 4m Vertical Dipole Antenna - The two dipoles are parallel with a distance of 12 cm and are also fed in parallel. The total length of the 4 m dipole is 208 cm and the 6 m dipole is 280 cm.
    [ Hits: 319 | Votes: 6 | Rating: 8.17 ]
Antennas : 80M
  • Top Loaded Vertical Antenna for 80 Meters Band - Top Loaded Vertical Antenna 3,5 MHz 80m and a 14 MHz Trap for the 20m band. The weight of this portable vertical antenna is less than 1 kg, including the ground network. The weight of the telescopic fiberglass fishing rod is another 1kg. The rod expands from 1.5 meters to 8 meters.
    [ Hits: 268 | Votes: 0 | Rating: 0 ]
Antennas : J-Pole
  • J-Pole for 14MHz - 20 meter wire j-pole for 14.2 MHz, a vertical, end-fed half wave antenna by N1LO
    [ Hits: 5227 | Votes: 3 | Rating: 5.67 ]
  • 20 Meter Jpole Vertical - The J pole vertical for 14MHz is built from a fifty-foot TV push up mast by Mike Higgins, K6AER
    [ Hits: 7837 | Votes: 6 | Rating: 6.5 ]
Antennas : Vertical
  • 6m Half wave vertical - This antenna is very useful for receiving or scanning purposes, but you can use it for transmitting, too. It is 2,94m long and has a pi-configuration (Collins-Filter) for the matching.
    [ Hits: 3960 | Votes: 4 | Rating: 7.75 ]
  • 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 ]
Radio Equipment : Reviews and Comparisons
  • Comparison of 4m Antennas - A comparison of commercial 4m verticals by by Ian Hogan G6TGO
    [ Hits: 334 | Votes: 0 | Rating: 0 ]
Technical Reference : Components : Toroids
  • Measured Data For HF Ferrite Chokes  new - FT-240 toroids measurements. The data was measured using well-calibrated HP instrumentation. All plots have been adjusted to a frequency range of 1-100 MHz on the horizontal axis and a resistance/impedance range of 10-1,000 ohms on the vertical axis. This adjustment facilitates comparison among different materials and aids in determining their suitability for use on the HF ham bands.
    [ Hits: 35 | Votes: 0 | Rating: 0 ]

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