zm 4 antenna

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zm 4 antenna

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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 : 40M : 40 meter Yagi Antennas
  • VE7CA portable tribander yagi  updated - 30/17/12 and 20/15/10-Meter Tribanders and a 40 meters inverted V wire yagi antenna
    [ Hits: 2647 | Votes: 1 | Rating: 5 ]
Antennas : 70cm Antennas : 80M
  • 80m Limited Space Antenna - 46ft multi-band antenna for small gardens. Works well on 80m. An excellent DX performer and is an ideal replacement for your half size G5RV
    [ Hits: 4125 | Votes: 5 | Rating: 6 ]
Antennas : Antenna Calculators
  • Center-Fed Wire Dipole Antenna Tuning Calculator - Ever need a way to estimate the amount of wire to add to or remove from a center-fed wire dipole antenna to achieve resonance at a desired frequency? This article help to determine correct wire lenght.
    [ Hits: 1006 | Votes: 7 | Rating: 2.86 ]
Antennas : Baluns
  • When and Where to Use Baluns - Baluns are usually used by Hams to feed dipole antennas with 50 ohm coax and to transpose from ladder line feeding a multi-band antenna to the unbalanced input of an antenna tuner.
    [ Hits: 1518 | Votes: 9 | Rating: 7 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • End Fed Half Wave Antenna for 6 / 40 Meter - 6m to 40m EndFed Half Wave Antenna project produces an inexpensive, multiband, end fed HF antenna matchbox that is quick and easy to setup and use.
    [ Hits: 3248 | Votes: 7 | Rating: 7.15 ]
  • Shortened EFHW Antenna 80-10m - A shortened multiband antenna, about 23m long, for 80m - 10m bands with a low SWR (<1.3) on 80m and 40m, and <3 till 10m. Bandwith on 80m is 300kHz
    [ Hits: 4116 | Votes: 10 | Rating: 6 ]
Antennas : Homebrewing Techniques
  • Adjusting HF Antenna Lengths - Find out how much to adjust the length of a quarter wave whip or a half wave dipole rather than the outright cut-and-try method.
    [ Hits: 859 | Votes: 4 | Rating: 5.75 ]
Antennas : J-Pole Antennas : Theory
  • The Classic Beverage Antenna Revisited - This is a QST Article published in January 1982 by W1FB D. Demaw and HH Beverage and is a complete review of the original article published in 1922, which updates and reivew the beverage antenna theory and developlment, explaining the antenna design of transformers and gives accurate reports on antenna general performance.
    [ Hits: 558 | Votes: 1 | Rating: 6 ]
Antennas : Tuners
  • Z-Match Antenna Tuner project - This Z-Match is a link coupled all-band tuner. Two all band tank circuits cover 3-14mhz and 14-30mhz. The tank output links are selected with a very heavy duty SPDT rotary switch.
    [ Hits: 1173 | Votes: 0 | Rating: 0 ]
Manufacturers : Accessories
  • EZMaster by HamRadioSolutions - EZMASTER the all mode all in one interface. USB/Parallel/Serial Device. Include 75 sec Digital Voice Keyer, K1EL Winkey CW Keyer, SO2R switching, two radio interface, two RTTY audio insulated ports, two flexible Antenna Switch control. Ideal for Contesting, SO1R, SO2R, field day and daily activity. Compatibile with all software on the market : CT, CTWIN, TR, NA, WriteLog, N1MM, WinTest, MMTTY, MIXW and more .
    [ Hits: 2084 | Votes: 4 | Rating: 4.25 ]

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