4 meter

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4 meter

813 links - and 9 categories

Antennas : 15M
  • Zippiro antenna for 40 Meters - Very compact and high efficiency antenna ,very low radiation angle even at low height.
    [ Hits: 1882 | Votes: 3 | Rating: 5.67 ]
  • 21Mhz 4el Yagi Antenna - A simple to build OWA Yagi with direct 50 Ohm feed. Easy to build with limited tools. 4 elements yagi for 15 meters band by G0KSC
    [ Hits: 2646 | Votes: 8 | Rating: 4.25 ]
Antennas : 40M
  • ZMV Spiral antennas - An experimental antenna similar to the TAK spiral antenna was evaluated for SWR response over the frequency range of 7.0 to 7.3 MHz, or the 40-meter band.
    [ Hits: 3175 | Votes: 7 | Rating: 5.28 ]
Antennas : 40M : 40 meter Delta Loop Antennas
  • 40 Meter delta loop - A delta loop wire antenna plan for the 7 MHz band (40 meters) that is quick to setup and work with
    [ Hits: 7135 | Votes: 5 | Rating: 4.60 ]
Antennas : 40M : 40 meter Dipole Antennas
  • W5VMs Shorty 40 Antenna - A shortened dipole for 40 meters band by Martin E. Meserve
    [ Hits: 1405 | Votes: 2 | Rating: 9.50 ]
Antennas : 4M
  • 8el 50Mhz / 70Mhz Dualband Yagi - Only just over 6 foot long, a compact 8 element dualband Yagi for 6 and 4 meters band. No traps or coils, no matching required. Simple to build by G0KSC
    [ Hits: 941 | Votes: 2 | Rating: 2.00 ]
Antennas : 6M : 6 meter Yagi Antennas
  • 6 Elements Yagi for 50 MHz - Six elements yagi antenna for 6 meters band. This antenna design is based on the QuickYagi 4 software by WA7RAI, uses a 6.5 m boom, feature 12.0 dBi gain and 35dB front/back
    [ Hits: 529 | Votes: 1 | Rating: 10.00 ]
Antennas : Baluns Antennas : Delta loop
  • Multi-Band Mono Delta Loop - Build a Multi-Band Mono Delta Loop for 40, 30, 20 and 15 Meters.
    [ Hits: 6145 | Votes: 6 | Rating: 5.83 ]
Antennas : Dipole
  • Folded dipole antenna by N4SPP - A quarter size cobra dipole antenna, a multiband dipole antenna for 40 to 10 meters basedn on original cobra dipole design but with a limited space by N4SPP
    [ Hits: 2287 | Votes: 1 | Rating: 8.00 ]
Antennas : Halo
  • 144 MHz Halo antenna - IW3HZX antenna project for a 2 meters halo, in italian
    [ Hits: 2209 | Votes: 8 | Rating: 2.25 ]
Antennas : Hentenna Antennas : J-Pole
  • Easy Jpole Building - Easy home brew 2 meter copper jpole antenna build - under 20 bucks - Hits repeaters 45 miles away. Parts used bought at home depot build time 1 hour.
    [ Hits: 2551 | Votes: 8 | Rating: 9.62 ]
Antennas : Vertical DX Resources : Beacons : 10 meter beacons Manufacturers : Antenna Analyzers
  • Bird Technologies - Bird Technologies supplier of RF products, like RF Meters, Bird 43, VNA, Spectrum analyzers, attenuators, transmitters combiners, dummyloads, terminators and replacement parts
    [ Hits: 1250 | Votes: 2 | Rating: 10.00 ]
Technical Reference : Amplifiers : HF Amplifiers
  • 5-band RF Power Amplifier - This project uses a widely available IRF510 MOSFET, work on HF 80, 40, 30, 20 and 17 meter bands
    [ Hits: 6613 | Votes: 4 | Rating: 6.75 ]
Technical Reference : Amplifiers : VHF Amplifiers
  • 2 meters Power Amplifiers - Several 144 MHz Power Amplifier by YT1AR using GI7B GS31B GS35B GU34B
    [ Hits: 2548 | Votes: 3 | Rating: 1.00 ]
Technical Reference : QRP Projects
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