v dipol

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v dipol

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Antennas : 4M
  • A centre-fed co-axial dipole for 4-m - This design has the following advantages low-cost components, Easy to set-up - nothing to adjust, no metalwork required, and only four soldered joints!
    [ Hits: 551 | Votes: 1 | Rating: 10 ]
Antennas : Antenna Calculators
  • Amateur Dipole Antenna Calculator - This calculator is designed to give the horizontal length of a particular dipole including Tees, antenna, or one side of it, for the frequency chosen. Enter the desired frequency and select the desired calculation from the drop box
    [ Hits: 1078 | Votes: 9 | Rating: 7.45 ]
Antennas : Baluns
  • Antenna Theory : Baluns - This article describe the principles of baluns when referred to devices used to balance unbalanced systems, like a coax cable and a dipole antenna
    [ Hits: 706 | Votes: 2 | Rating: 9 ]
  • 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 : Dipole
  • Bent Dipoles reference website - Antenna modeling discussions about What happens if... a dipole is bent horizontally, laterally, vertically. Zig-zag, meander, catenary curve. Effect of sag, elevation, radials. OCF off-center feed, harmonics. Includes 4NEC2 antenna models for each study.
    [ Hits: 707 | Votes: 0 | Rating: 0 ]
  • A 10-6-4 three band dipole antenna - A home made dipole antenna for 10m, 6m, 4m bands made with two sections of 450 and 300 Ohm ladder lines, cut to achieve acceptable SWRs on all bands
    [ Hits: 1016 | Votes: 5 | Rating: 8.2 ]
  • QRO No-Tuner Multiband Dipole - Construction details of a multiband dipole that can can operate at high power levels, and match its 50-ohm coax feedline without a tuner
    [ Hits: 1502 | Votes: 2 | Rating: 4.5 ]
  • A simple 20-40 dipole - A simple to build full length 20/40 dipole antenna to be used in inverted vee configuration
    [ Hits: 992 | Votes: 3 | Rating: 5.67 ]
Antennas : Portable
  • A lightweight dipole for 2 m - A simple portable antenna for SOTA VHF is described in this article dedicated to portable operations
    [ Hits: 497 | Votes: 0 | Rating: 0 ]
  • A Lightweight Link Dipole - Homebrewing a Lightweight linked dipole HF antenna for portable SOTA operations
    [ Hits: 445 | Votes: 0 | Rating: 0 ]
Antennas : Theory : Impedance matching
  • The Gamma Match - The gamma match was originally invented as a means of feeding vertical monopole antennas for medium wave broadcasts, which were earthed at the base for lightning protection- Hams are more likely to use a gamma match to feed a dipole or loop element, but the basic theory is easier to understand for the case of a quarter wave monopole.
    [ Hits: 954 | Votes: 2 | Rating: 4.5 ]
Antennas : VHF UHF
  • VHF UHF Coaxial Dipole Antenna - A base station antenna you can easily build for 146,220 or 440 MHz, with performance similar to a J-pole but smaller and less obstrusive
    [ Hits: 2922 | Votes: 15 | Rating: 5.55 ]
  • VHF / UHF Antenna Design - A dipole for 2m, 4m, 6m band an hamdwritten note for a homemade vhf antenna that can be tuned across the VHF band
    [ Hits: 1690 | Votes: 10 | Rating: 7.08 ]
Antennas : Wire
  • Basic Wire Antennas Part I - A presentation of popular wire antenna models like Dipoles, half size, full size, doble zepp, ocf dipoles, G5RV
    [ Hits: 1646 | Votes: 0 | Rating: 0 ]
Antennas : Yagi
  • W8JK Beam Antenna - The W8JK is a famous and effective DX antenna, first built by John Kraus, W8JK, in 1937. A Beam antenna with two parallel dipoles driven with opposite phase, with a close spacing of an eighth of a wavelength.
    [ Hits: 5142 | Votes: 21 | Rating: 7.19 ]
Manufacturers : Antennas : HF
  • Maxcon Antennas - Maxcon makes and sells Amateur Radio Antennas. Double extended Zepp antenna, multiband dipoles, bazooka antennas, and VHF Jpole, made in USA
    [ Hits: 387 | Votes: 2 | Rating: 4.5 ]
Radio Equipment : HF Portable Antenna : Buddipole Technical Reference : Coax Cables and Connectors
  • PL259 Surge Arrestor - Limiting static surges on dipoles, verticals or end fed antennas
    [ Hits: 900 | Votes: 0 | Rating: 0 ]

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