wave length cal

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wave length cal

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Antennas : 160M
  • KE4UYP Linear loaded vertical antenna - This is a vertically and horizontally polarized antenna the Linear loaded 1/4 wave length vertical radiator introduces very little loss for 80 or 160 meters
    [ Hits: 13790 | Votes: 18 | Rating: 6.71 ]
  • The 160M Homebrew Vertical - The 160M "No Excuses" Homebrew Vertical is a 27 ft. vertical antenna, made from three 10 ft. PVC sections bolted together, and half wavelength of antenna wire helically wound around the PVC sections by K6MM
    [ Hits: 6587 | Votes: 15 | Rating: 6.14 ]
  • A Potpourri of 160-Meter Verticals - A potpourri of 160-Meter vertical antennas and modeling issues, inverted-L, 3-element parasitic array, 1/4-wavelength monopole
    [ Hits: 3646 | Votes: 0 | Rating: 0 ]
Antennas : 40M : 40 meter Vertical Antennas
  • 40m vertical antenna - A simple quarter-wave length vertical for 40m band using a 12 m spiderpole
    [ Hits: 2029 | Votes: 1 | Rating: 7 ]
Antennas : 80M
  • 80M Grounded Half Loop - The grounded half loop describe in this article is basically a half wave length wire on 80 Meters
    [ Hits: 1115 | Votes: 1 | Rating: 1 ]
Antennas : Antenna Calculators
  • Amateur Vertical Antenna Calculator  pop - This basic calculator is designed to give the aproximate length (height) of a particular vertical antenna, for the frequency and wavelength chosen.
    [ Hits: 46415 | Votes: 230 | Rating: 5.48 ]
  • Quarter Wave GP Antenna Calculator - Amateur quarter wave ground plane antenna calculator, calculate vertical and radial length
    [ Hits: 4839 | Votes: 24 | Rating: 6.04 ]
  • Helical Antenna Design Calculator - Helical antennas invented by John Kraus give a circular polarized wave. They are one of the easiest to design. Find a tube with a circumference equal to one wavelength, and wrap wire in a helix spaced a quarter wavelengt
    [ Hits: 2155 | Votes: 15 | Rating: 6.41 ]
Antennas : Array
  • Bobtail dipole - Bobtails are vertical arrays that look like the letter "E" turned 90° clockwise onto its tails. They have 3 quarter wave vertical elements and are one wavelength long. The Half Square is a shortened Bobtail- it has 2 quarter wave vertical elements and is a half wave long.
    [ Hits: 1911 | Votes: 0 | Rating: 0 ]
Antennas : Dipole
  • Folding the Dipole - The half wave dipole antenna is a simple and practical antenna model that consists of a half wavelength long centre fed conductor.
    [ Hits: 2377 | Votes: 4 | Rating: 7.5 ]
Antennas : Four Square
  • TX Four Square Antenna - A 220-ft tower that has five catenary lines, each about 500 feet long. Four of these lines, running NE, SE, SW, and NW support four 1/4-wavelength wire verticals used in a 160-meter four-square antenna.
    [ Hits: 787 | Votes: 0 | Rating: 0 ]
Antennas : Installation
  • Broadcast Antennas on Buildings - When a broadcast antenna is to be placed on top of a building, there are special problems of feeding and grounding. The radiator is usually electrically short, that is, much less than one-quarter wavelength high.
    [ Hits: 357 | Votes: 2 | Rating: 10 ]
Antennas : J-Pole
  • Super J-Pole for 435MHz - The Super J Pole antenna is a co-linear vertical consisting of a number of half wave length vertical elements separated with half-wave length stubs (Tuning stub) feed with a folded matching stub by vk6ysf
    [ Hits: 3369 | Votes: 6 | Rating: 5 ]
Antennas : Mobile Antennas : Theory
  • Quarter Wave Verticals - One of the most useful antennas in the repertoire is the Marconi or quarter wave grounded vertical antenna. Its invention made it possible to halve the length of antennas, simplifying communications, especially at HF and below.
    [ Hits: 1759 | Votes: 2 | Rating: 7 ]
  • Quarter Waves and Velocity Factor - Coax Velocity Factor in Baluns, Does it Matter? Test results show coaxial cable velocity factor does not always enter into stub length calculations especially in the world of Baluns
    [ Hits: 208 | Votes: 0 | Rating: 0 ]
Antennas : VHF UHF
  • VHF/UHF Yagi Antenna Design  updated  pop - Design your VHF UHF Yagi antenna online, a JavaScript enhanced web page that implements the design of an antenna for 2m and 70cm bands. This page offers a streamlined experience for Yagi antenna design enthusiasts. It assumes prior knowledge of Yagi design principles, minimizing distractions with a user-friendly interface. Equipped with essential equations, it provides instant design feedback. Red font warnings indicate design limitations, ensuring practical results. Constraints include Gain (11.8-21.6 dBd) and Boom Length (2.2-39 wavelengths), with additional frequency-dependent restrictions noted in input fields.
    [ Hits: 147387 | Votes: 1105 | Rating: 6.95 ]
Antennas : Vertical
  • VHF 5/8wave vertical antennas - By Guy, de ON6MU, At VHF, both the 1/4-wavelength monopole and the 5/8-wavelength monopole antennas are widely used.
    [ Hits: 1937 | Votes: 4 | Rating: 5.5 ]
Antennas : Wire
  • Long wire antenna random wire - About longwire antennas, technically to be a true longwire an antenna needs to be at least one wavelength long, but common use of the term by Hams is for any random wire length that is end fed.
    [ Hits: 1316 | Votes: 2 | Rating: 4 ]
Technical Reference : Coax Cables and Connectors
  • Coaxial Cable & Power Handling - This calculator can be used to estimate the attenuation (dB loss), power handling capability, and transmission efficiency for some of the more popular Wireless Communications and MIL Spec cables at the frequency of interest
    [ Hits: 1181 | Votes: 8 | Rating: 8.17 ]

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