hf vertical

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hf vertical

115 links - and 4 categories

Antennas : 20M : 20 meter Vertical Antennas
  • A Simple High-Performance Vertical Antenna - This article describes the details of the design, which can be easily scaled for just about any HF band. The antenna described in this article is for the 20 meters band.
    [ Hits: 660 | Votes: 3 | Rating: 9.67 ]
  • 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 : 6M : 6 meter J-Pole Antenna
  • Simple 50MHz J-Pole Antenna EA7AHG - Based on the popular DK7ZB simple 50 MHz Jpole antenna, this customized jpole project has been analized with MMANA-GAL and reproduced for six meters, two meters and 70 cm bands.
    [ Hits: 278 | Votes: 1 | Rating: 4 ]
Antennas : Magnetic Loop
  • Magnetic Loop antenna for VHF - A magnetic loop antenna for the VHF band, featuring a high gain that can be compared to a quarter wave vertical antenna
    [ Hits: 731 | Votes: 9 | Rating: 5.99 ]
Antennas : Portable
  • Build this Vertical Portable HF Antenna - An experimental prototype of an asymmetrical hatted vertical dipole antenna that can work on HF bands 20 to 10 meters band. The AHVD Vertical dipole is an upside-down T design
    [ Hits: 373 | Votes: 3 | Rating: 9.67 ]
Antennas : Stealth
  • Balcony Vertical HF Antenna - The simple balcony vertical HF antenna made with plastic fishing pole. Just along the pole I install copper wire in 7 meter length. Then was installed ATU. It was used home brew tuner. For each band was used one counterpoise in length 0.8 x lambda/4
    [ Hits: 237 | Votes: 0 | Rating: 0 ]
Antennas : Theory
  • Variations on a Dipole - Antenna patterns are all about interference. Presentation on wire antennas for HF bands. Dipoles, horizontal and vertical dipoles, effects of ground on radiation patterns, multi-band wires antennas. Knowing what you should expect from the radiation patterns for waves on your wires will help you choose what will work best for your needs. The principles of interference can lend insight into what to expect from a wire antenna.
    [ Hits: 98 | Votes: 0 | Rating: 0 ]
Antennas : VHF UHF
  • VHF UHF BiQuad - This is a vertically polarized Broadside and Collinear Array each Loop is a vertically polarized Broadside Array both the right and the left side of the Loop is a bent 1/2 wave dipole working 180 degrees out of phase with the other one and that gives you 4.15dbi of gain
    [ Hits: 174 | Votes: 0 | Rating: 0 ]
Antennas : Vertical
  • A 40m-10m vertical antenna with elevated radials - A multiband vertical antenna for HF bands with elevated ground radials slant down at 45 degrees and acting also as guy wires.
    [ Hits: 540 | Votes: 1 | Rating: 6 ]
  • Verticals - About vertical antennas - Experiments on vertical antennas for HF bands.
    [ Hits: 249 | Votes: 0 | Rating: 0 ]
  • Homebrew 5/8 Wave HF Vertical Antennas - The advantage of 5/8 wave antenna is that it has the lowest angle of radiation and has about 1dB more gain when compared to 1/4 and 1/2 verticals. So the 5/8 should be the favourite choice for DX.
    [ Hits: 712 | Votes: 2 | Rating: 8 ]
Antennas : Wire
  • HF Wire Antennas for Field Day - Dipole antennas, vertical half-wave dipole antennas with impedence tranformes that can be used for portable operations. Some well worn antenna configurations are the easiest and loudest lash-ups you can try.
    [ Hits: 219 | 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 ]
Radio Equipment : HF Vertical Antenna : GAP Titan
  • Gap Titan DX Antenna Manual - Installation and assembly instructions for the multiband HF vertical Antenna by GAP
    [ Hits: 365 | Votes: 1 | Rating: 4 ]
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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