4 meter

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4 meter

852 links - and 11 categories

Antennas : 15M
  • Zippiro antenna for 40 Meters - Very compact and high efficiency antenna ,very low radiation angle even at low height.
    [ Hits: 2112 | Votes: 3 | Rating: 5.67 ]
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: 3431 | Votes: 8 | Rating: 5.37 ]
Antennas : Baluns Antennas : Delta loop Antennas : Dipole Antennas : Folded 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: 2619 | Votes: 1 | Rating: 8 ]
Antennas : HB9CV 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 : K9AY
  • RX antenna for 160/80 meters - RX Antenna 160m/80m Band Splitter/Switch, a small project that will work along with the K9AY RX antenna
    [ Hits: 2058 | Votes: 0 | Rating: 0 ]
Antennas : OCF Antennas : Vertical
  • Multiband HF Vertical - A telescopic pole that you adjust to suit the band you're working on , tested on 40 20 and 15 meters band by M0PZT
    [ Hits: 2379 | Votes: 5 | Rating: 7 ]
DX Resources : Beacons : 10 meter beacons Manufacturers : QRP Kits
  • QROlle, 6 Band QRP-rig - QROlle QRP-rig. 6 Band Shortwave rig with SMD:s. 160, 80, 40, 30, 20, 17 meters SSB/CW QRP-rig. All documentation in English
    [ Hits: 2235 | Votes: 2 | Rating: 9.5 ]
Radio Equipment : HF Vertical Antenna : GAP Titan 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: 6951 | Votes: 5 | Rating: 7.4 ]
Technical Reference : QRP Projects
  • A 40 meter SSB QRP transceiver - This transceiver was conceived as a power-efficient, small, lighweight unit to be carried in the backpack, along with antenna and battery.
    [ Hits: 2298 | Votes: 1 | Rating: 1 ]
  • QRP transceiver for 7 Mhz - An optimized QRP transceiver for 40 meters band
    [ Hits: 1216 | Votes: 2 | Rating: 5.5 ]
Technical Reference : QRP Projects : QRP CW Transceiver

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