antenna

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antenna

3777 links - and 176 categories

Antennas : 2M
  • 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: 5293 | Votes: 15 | Rating: 5.27 ]
  • 8 Element Quad for 145 Mhz  pop - 8 elements quad antenna for 2 meters band, centered on 145 Mhz
    [ Hits: 29181 | Votes: 101 | Rating: 5.88 ]
  • A portable 2-element VHF yagi  pop - Build a portable VHF yagi antenna for 2 meters. All you need is two rabbit ear antennas from Radio Shack, two CATV baluns, four feet of 3/4 CPVC pipe with one tee.
    [ Hits: 27960 | Votes: 23 | Rating: 7.26 ]
Antennas : 40M : 40 meter Vertical Antennas
  • 7Mhz Vertical antenna - The secret with this antenna is to install as many radials as you can around the base of the antenna, they can be anything from 1/8 wave or longer.
    [ Hits: 23643 | Votes: 15 | Rating: 4.14 ]
Antennas : 80M
  • Switchable Antenna 80/160 meters band - A switchable antenna for 80/160 meters by IK1ZOY. A new version of a 1/4L 80 m. dipole modified for use in 160 m. band. using it's own coaxial cable feeder to wrap a coil.
    [ Hits: 16767 | Votes: 6 | Rating: 5.5 ]
Antennas : Lindenblad Antennas : Loop
  • Umbrella Loop Antenna - Contruction notes of an Umbrella Loop antenna for AM shortwave listenings
    [ Hits: 8764 | Votes: 2 | Rating: 5 ]
Antennas : Magnetic Loop
  • Thinking about Ideal Loops - Loop antennae have been used from ELF to UHF since the beginning of radiocommunications. At low frequencies, the main problem for loop antennae is to have enough sensitivity; the antenna being very small respect to the wavelength the collected energy is also small. To increase the output level the loop may be made resonant, so loosing it%u2019s intrinsic aperiodic characteristics.
    [ Hits: 2118 | Votes: 2 | Rating: 6.5 ]
  • HF Receiving Loop Antenna - HF receiving loop antenna, an easy-to-make receiving loop antenna for HF
    [ Hits: 18485 | Votes: 8 | Rating: 6.75 ]
Antennas : Mobile
  • Effective HF Mobile Antennas - Effective HF Mobile Antennas Keith WB2VUO, explains difficulties on gaining antennas efficiency on lower bands with mobile antennas.
    [ Hits: 7824 | Votes: 4 | Rating: 6.75 ]
Antennas : Shortwave
  • Roofspace Antennas  pop - How to build a roofspace antennas and get them to work. Explains how to build an effective antenna in your roof. Very interesting if you don't have possibilities to setup an antenna in your roof.
    [ Hits: 45833 | Votes: 17 | Rating: 4.88 ]
Antennas : Vertical
  • Groundplane antenna - Short guide to build your own groundplane antenna, includes radial measurements fro warc bands
    [ Hits: 5358 | Votes: 2 | Rating: 10 ]
  • 7 MHz Vertical antenna  pop - 7 MHz Vertical antenna for ham radio band of 40 meter text in spanish and english
    [ Hits: 33607 | Votes: 95 | Rating: 8.48 ]
Antennas : Wire
  • 40m Short Antenna  pop - GM4JMU shortened dipole for 40 meters band
    [ Hits: 26912 | Votes: 30 | Rating: 4.97 ]
  • How create simple dipoles - How to create a simple but effective half wave dipole, illustrated instrucions on how to build wire antennas
    [ Hits: 3283 | Votes: 4 | Rating: 6.5 ]
Manufacturers : Accessories
  • ON4AOI Automatic Band Decoder - Automaticaly select the correct antenna and bandpass filter, by ON4AOI
    [ Hits: 1339 | Votes: 4 | Rating: 7.25 ]
Manufacturers : Antenna Rotators
  • C.A.T.S, Rotor Doc - Manufacture CATS antenna rotator and digital controls. Service, stock, and provide parts for top quality AMERICAN-MADE antenna rotators from companies such as Alliance, C.A.T.S., CDE/Hy-Gain, and Channel Master, both young and old.
    [ Hits: 7356 | Votes: 17 | Rating: 6.47 ]
Manufacturers : Antennas
  • Digital Smart Antennas DiSA - Digital Smart antenna (DiSA) Automatically Adjusts over a wide band of frequencies.
    [ Hits: 859 | Votes: 2 | Rating: 5.5 ]
Shopping and Services : Parts & Surplus
  • Skycraft Parts - Skycraft Parts & Surplus, Electronic Surplus Store in the Southeast, antenna parts, wires.
    [ Hits: 1006 | Votes: 0 | Rating: 0 ]
Shortwave Radio : Beginner's guides
  • Getting Started in SW Listening - Excellent and exaustive guide to shortwave listening offered by monitoringtimes, includes operating guides, technical suggestions, buying guieds, antennas implementations and more, all what is needed by shortwave listening beginners.
    [ Hits: 4990 | Votes: 19 | Rating: 6.8 ]

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