4 meter

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4 meter

850 links - and 11 categories

Antennas : 2M
  • A cheap dual band ground plane antenna - This little antenna is cheap and easy to build, lightweight, and very functional on 2 meters and 70 centimeters by NA4IT
    [ Hits: 3462 | Votes: 3 | Rating: 6 ]
  • Portable 4-Element Quad for 2 meters - A portable 4 elements quad antenna for 144 MHz, 9 to 10 DBd forward gain, 30 DB front-to-back ratio, and 33 DB front-to-side ratio
    [ Hits: 2147 | Votes: 2 | Rating: 8 ]
Antennas : 40M
  • ZZ Wave net antenna - Setting up a ZZ Wave antenna, a dual band loop antenna covering 80 and 40 meters.
    [ Hits: 565 | Votes: 0 | Rating: 0 ]
Antennas : 40M : 40 meter Yagi Antennas Antennas : HexBeam Antennas : Moxon
  • 40 Meter Moxon - A Mini Moxon antenna for 40 meters band project in a well done PDF document
    [ Hits: 2517 | Votes: 4 | Rating: 3.75 ]
Antennas : Multiband
  • A Multi-band HF loop antenna - The multi band HF loop antenna, a good performer on 80 and 40-10 meters. This excellent article covers all aspects of designing a resonant loop antenna, examining gain and radiation patterns, and describing practical notes on how to build this antenna.
    [ Hits: 11210 | Votes: 26 | Rating: 6.76 ]
Antennas : NVIS
  • 40 Meter NVIS antenna - Near Vertical Incidence Skywave (NVIS) and the 40 meter Novice Sub-band.
    [ Hits: 1658 | Votes: 0 | Rating: 0 ]
  • Super Gain NVIS antenna - A 40 meter NVIS beam antenna by W4NVK
    [ Hits: 1294 | Votes: 0 | Rating: 0 ]
Antennas : Slim Jim
  • 2 Meter Slim Jim Antenna - A 144 Mhz Slim Jim Antenna, aluminum tubing version project by Mohammad 9W2WTF
    [ Hits: 1025 | Votes: 1 | Rating: 10 ]
Antennas : Vertical
  • 5 bands HF portable antenna - A vertical portable antenna system by W0SJS that will work on 40, 30, 20, 17 and 15 meters
    [ Hits: 1865 | Votes: 1 | Rating: 6 ]
  • K0WA 40 meter verticle - The antenna is comprised of three lengths of 12 foot aluminum which telescope together.
    [ Hits: 714 | Votes: 0 | Rating: 0 ]
DX Resources : Contest : Contest Rules
  • IARU HF WORLD Championship - IARU HF Contest, goal is to contact as many other amateurs, especially IARU member society HQ stations, around the world as possible using the 160, 80, 40, 20, 15 and 10 meter bands.
    [ Hits: 284 | Votes: 0 | Rating: 0 ]
Operating Modes : 70 MHz Radio Equipment : HF Transceivers : Kenwood TS-450S
  • Kenwood TS-450S - The Kenwood TS-450S is a formidable transceiver covering 160 through 10 meters including the WARC bands with 100 watts input
    [ Hits: 434 | Votes: 1 | Rating: 10 ]
Radio Equipment : HF YAGI Antennas : Cushcraft A3S
  • Cushcraft A3S/A743 Performance - Cushcraft A3S performances with the A743 kit to add 30 and 40 meters
    [ Hits: 753 | Votes: 1 | Rating: 8 ]
  • Cushcraft A3S - A743 - About the Cushcraft A3S with A743 add-on for 30 an 40 meters
    [ Hits: 687 | Votes: 1 | Rating: 8 ]
Technical Reference : Arduino
  • Arduino antenna tuner - This project describes an ARDUINO based automatic antenna tuner, for an end-fed half wave (EFHW) antenna, working on 20 & 40 meter bands
    [ Hits: 4898 | Votes: 9 | Rating: 6.04 ]
Technical Reference : Raspberry Pi Technical Reference : Test Equipment : RF Probe
  • RF Probs and Watt meter - This RF probe can be used at High Frequency (HF) or Ultra High Frequency (UHF) on both 50 and 75 ohm coaxial cables.
    [ Hits: 602 | Votes: 1 | Rating: 10 ]

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