radiator

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radiator

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Antennas : 160M
  • KE4UYP Linear loaded vertical antenna - This is a vertically and horizontally polarized antenna the Linear loaded 1/4 wave length vertical radiator introduces very little loss for 80 or 160 meters
    [ Hits: 13791 | Votes: 18 | Rating: 6.71 ]
Antennas : 20M
  • Cedevita-20 Antenna - The Cedevita-20 is a hybrid monoband antenna, the result of merging the radiator of a shortened vertical with one element of a dipole. It fits on most balconies and must be hung from the ceiling. By ik1zyw Paolo Cravero
    [ Hits: 5374 | Votes: 3 | Rating: 5.33 ]
Antennas : 2M
  • QM5 Yagi for 2 meters band - The QM5 antenna is a simple 5 elements Yagi with 1.88 m boom length for the lower 144 MHz SSB/MGM band, I used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 9.17 dBd; i.e. 11.3 dB forward gain over the isotropic radiator, while the F/R is about 11.5 dB. Elements
    [ Hits: 6869 | Votes: 4 | Rating: 5.25 ]
  • QM7 7 elements 144 MHz Yagi-Uda Antenna - The QM7 antenna is a simple 7 elements Yagi with 3.70 m boom length for the lower 144 MHz SSB/MGM band, used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/R is about 12.5 dB
    [ Hits: 5361 | Votes: 15 | Rating: 5.27 ]
Antennas : 40M
  • A 40 meters DDRR Antenna - A direct drive ring radiator antenna for the 40 meters band by W6WYQ QST article.
    [ Hits: 3399 | Votes: 8 | Rating: 3.37 ]
Antennas : Feed Lines : Choke
  • Choke balun - Essentially, a choke balun is designed to 'divorce' your antenna from the feed line. if your feed line is coaxial cable then you don't want it to be part of your antenna. you want to be able to deliver all your power to the radiator itself, i.e. 'the antenna'. a choke balun does this admirably
    [ Hits: 573 | Votes: 11 | Rating: 7.27 ]
Antennas : Homebrewing Techniques
  • PVC Yagi antennas - techniques - Collection of different techniques to homebrew PVC yagi antennas, including elements assembling, baluns and chokes, radiator box tips and tricks by dk7zb
    [ Hits: 1609 | Votes: 4 | Rating: 3.5 ]
Antennas : Installation
  • Broadcast Antennas on Buildings - When a broadcast antenna is to be placed on top of a building, there are special problems of feeding and grounding. The radiator is usually electrically short, that is, much less than one-quarter wavelength high.
    [ Hits: 358 | Votes: 2 | Rating: 10 ]
Antennas : J-Pole
  • The DBJ-2 portable J-Pole - A Portable VHF-UHF Roll-up J-pole Antennam that resonates on both bands but actually performs as a half wave radiator on both bands
    [ Hits: 4334 | Votes: 4 | Rating: 7 ]
Antennas : Mobile
  • A $20 HF mobile antenna - A few hours of fun with PVC and wire and you have got yourself a respectable road radiator. The antenna consists of little more than some PVC pipe topped by a RadioShack replacement whip antenna and a couple of coils made from a small roll of #14 house wire.
    [ Hits: 10545 | Votes: 6 | Rating: 7.33 ]
Antennas : Multiband
  • Homemade Carolina Windom antenna - This multiband wire antenna it is an off centre fed dipole, with 10 feet of vertical radiator, needs no tuner on 40m, 20m and 10m and works fine on all bands above 40m with a tuner, and even below 40m on 60m, and 80m.
    [ Hits: 8183 | Votes: 12 | Rating: 7.58 ]
  • The 5 Bands Wire-Beam - This wire-beam has one radiator-element, feeded with 450-Ohm-Wireman-twinlead and needs an antenna-tuner. For the bands 6m, 10m, 12m, 15m, 17m and 20m bended reflector-elements are used. The support is a cross of 4 fibreglass-fishing-rods
    [ Hits: 5647 | Votes: 2 | Rating: 7 ]
  • Errante's 225 Ohm multiband HF antenna - Unlocking the full multiband potential of the 225 Ohm elementary radiator in a folded monopole, dipole-like or turnstile layout, by Francesco Errante
    [ Hits: 1303 | Votes: 3 | Rating: 7 ]
Antennas : Theory Antennas : VHF UHF
  • Double 5 / 8 Flower Pot Antenna - The Double 5/8 is a natural extension of the Single 5/8 and uses a 5/8λ element for both the top and bottom radiators.
    [ Hits: 1021 | Votes: 2 | Rating: 6 ]
Antennas : Vertical
  • 9 band vertical HF antenna by RW3XA  pop - Simple vertical radiator with matching box. No traps, no tuner required for this multiband antenna
    [ Hits: 38740 | Votes: 43 | Rating: 7.34 ]
Antennas : Windom Antennas : Yagi
  • 2-El Portable Yagi for 10-20 mt - This Yagi has a constant element-distance of 1,50 m. You must only correct the lengths of the elements for QSY, see table down. For the bands 10 m and 12 m the Yagi is working as a reflector-radiator-Yagi, for 15 m and 17 m as a beam with radiator and director.
    [ Hits: 3189 | Votes: 5 | Rating: 5.2 ]
Shopping and Services : Marine Radio
  • Malux - El-Tele-Data - Accessories, Antennas and Battery chargers. Radiators, Repeaters, Yagi, Mag, Car, Tetra, Marine, Multiband, Brackets, Mounting accessories, cables and connectors, radiokits, special cables etc. Based in Finland
    [ Hits: 780 | Votes: 1 | Rating: 8 ]

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