220 band

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220 band

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Antennas : J-Pole

  • Tri-Band J-Pole - This strange looking antenna is a combination of Coupled-Resonator principle by K9AY and a quarter stubs to achieve low angle radiation pattern. Designed with 4nec2 NEC based antenna modeler and optimizer for 145/220/440MHz bands
    [ Hits: 1145 | Votes: 2 | Rating: 10.00 ]
  • 3 band J-Pole Antenna - Pictures of a 2 meter, 220, 440 copper J-Pole antennas
    [ Hits: 1634 | Votes: 7 | Rating: 5.00 ]
Manufacturers : Antennas : VHF UHF Microwave
  • The Ventenna - Rugged, disguised 2m, 220MHz, 440MHz, and 2m/440 dual band antennas, HF portable antennas, portable dipoles.
    [ Hits: 4358 | Votes: 18 | Rating: 8.55 ]
Operating Modes : Longwave
  • Low Frequency Transmission Modes - Article by W1TAG on operating modes used on low-banding. The 2200 meter band (135.7 - 137.8 kHz) is only 2.1 kHz wide, so voice work on SSB or AM is out. Find out the best modes on LF
    [ Hits: 350 | Votes: 0 | Rating: 0.00 ]
Radio Equipment : VHF-UHF Mobile : ICOM IC-2720H
  • IC-2720H Extended TX/RX Mod - IC-2720H it will receive fine on 220MHz amateur band, but will NOT transmit there
    [ Hits: 2099 | Votes: 7 | Rating: 7.57 ]
Technical Reference : Amplifiers
  • SB220 SB221 arcing problems improvements mods - This article explores the claim an amplifier might arc from a parasitic oscillation, damaging capacitors, bandswitches, or other components.
    [ Hits: 1211 | Votes: 2 | Rating: 10.00 ]
Technical Reference : Preamplifiers
  • 137 kHz antenna preamplifier - A simple 137 kHz antenna preamplifier to make your FT-817 (and others) useable on 2200m band.
    [ Hits: 898 | Votes: 3 | Rating: 6.67 ]
Technical Reference : Repeater
  • Cross Band Repeaters - Crossband Repeating is a process where a Ham transmits one signal on one band (typically UHF), and it is received by another radio with a better antenna/power installation, and re-transmitted (typically on VHF) to another radio system, or a repeater. Everyday examples of cross-band repeaters are repeater receive sites that hear the input signals on 2m and retransmit those signals on a frequency higher than 220 MHz.
    [ Hits: 62 | Votes: 0 | Rating: 0.00 ]
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