l antennas

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l antennas

1362 links - and 47 categories

Antennas : 2M
  • Make your own 2 metre 5/8 whip antenna - This article is about a home made project of a whip antenna for 2 meters band. Includes lenght of whip for all frequencies from 140 MHz to 151 MHz both in mm and inches
    [ Hits: 295 | Votes: 1 | Rating: 5 ]
Antennas : 30M
  • A 30 Meter Sloping Dipole Antenna - This variation of the basic horizontal, half wavelength flat top dipole has proven to be a simple, effective antenna suitable for both home and portable use.
    [ Hits: 336 | Votes: 0 | Rating: 0 ]
Antennas : 40M
  • A comparison of 40 meter beam antennas - This page describes a comparison study on seven different beam antennas for 40 meters band. Yagi antennas, moxon antennas, mini horse all antennas are described with schema diagram , azimuth plot and SWR F/B Gain diagram
    [ Hits: 228 | Votes: 0 | Rating: 0 ]
Antennas : 6M : 6 meter J-Pole Antenna
  • 50MHz / 6m J-pole Antenna by VK4ADC - The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarized antenna without the need for a ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.
    [ Hits: 353 | Votes: 2 | Rating: 4.5 ]
Antennas : Baluns
  • Baluns and common mode chokes - Voltage baluns versus Current baluns. When to use them, differences, and typical usage in feeding antennas, or in resolving radio frequency interferences.
    [ Hits: 368 | Votes: 1 | Rating: 10 ]
Antennas : Dipole
  • The half-wave dipole, your first antenna - Construction tips of a basic wire antenna, the half wave dipole. Inverted V dipoles and effects of inverted v on radiation pattern.
    [ Hits: 215 | Votes: 1 | Rating: 9 ]
Antennas : Folded Dipole
  • Folded Dipole Antennas - The folded dipole antenna or folded dipole aerial is widely used, not only on its own, but also as the driven element in other antennas like the Yagi antenna and various other types of antenna. Folded Dipole Myths, Bandwidth and details on folded dipoles
    [ Hits: 334 | Votes: 3 | Rating: 4.67 ]
Antennas : Helical
  • Helical Antennas -Theory - Helical antenna or helix antenna is the antenna in which the conducting wire is wound in helical shape and connected to the ground plate with a feeder line. It is the simplest antenna, which provides circularly polarized waves.
    [ Hits: 101 | Votes: 0 | Rating: 0 ]
Antennas : J-Pole
  • J-pole antenna Calculator - Online calculator for J-Pole antennas. The J-pole antenna consists of a short and a long vertical pole with a feed point near the bottom. The antenna looks like the letter J, hence the name J-pole antenna.
    [ Hits: 317 | Votes: 0 | Rating: 0 ]
Antennas : Theory
  • The Yagi Antenna - Presentation - A presentation of the Yagi Antennas, and other interesting tid-bits by Brian Mileshosky. This document explains basic concepts of Yagi-Uda antenna theory, influence of reflector and directors on global antenna gain and directivity of radio waves. A simple tape measure antenna project is also included.
    [ Hits: 393 | Votes: 2 | Rating: 7 ]
Antennas : Towers
  • Towers Setup at Jonesport - picture gallery - Photo gallery of a work of several weeks consisting of the construction of 5 towers and 28 antennas at the new Jonesport, ME station.
    [ Hits: 121 | Votes: 0 | Rating: 0 ]
Antennas : VHF UHF
  • Modifications to the Diamond V2000 and similar antennas - This kind of antenna has grown in popularity over the last years because it gives you a decent performance and triband capabilities. But its 50 MHz design is far from optimal. Here you can learn how to improve its 50 MHz performance in a very easy way.
    [ Hits: 438 | Votes: 2 | Rating: 9.5 ]
Antennas : Vertical
  • Homebrew 5/8 Wave HF Vertical Antennas - The advantage of 5/8 wave antenna is that it has the lowest angle of radiation and has about 1dB more gain when compared to 1/4 and 1/2 verticals. So the 5/8 should be the favourite choice for DX.
    [ Hits: 581 | Votes: 2 | Rating: 8 ]
Antennas : Yagi
  • How to stack dissimilar yagi antennas - In this article the author provides some guidelines on how to solve a common problem when stacking different types of yagi antennas on the same mast, limiting the effects on gain and radiation pattern of both antennas
    [ Hits: 529 | Votes: 1 | Rating: 9 ]
Operating Aids : History
  • From Windom Antenna to Multiband OCFD - The Windom antenna, one of the oldest antennas developed for amateur use, has had a complicated history, one as interesting as the theory of the antenna itself.
    [ Hits: 286 | Votes: 2 | Rating: 5.5 ]
Shopping and Services : Antenna Parts
  • Tino Funkshop - German antenna parts dealer, provides antenna element holders, element clamps for yagi antennas, junction boxes, aluminium plates and rods. Offers also Rope tensioners, plugs and adapters and any additional part you need when you want to make your own antenna.
    [ Hits: 177 | Votes: 0 | Rating: 0 ]
  • Antena KIT - Online shop for amateur radio antenna parts, accessories, holders, clips and insulators for home made antennas. Antena Kit delivers also ham radio transceiver mounts, cables, antenna rotors and other accessories. Based in Brazil
    [ Hits: 283 | Votes: 0 | Rating: 0 ]
Shopping and Services : Regional : Asia
  • Wuxi Venus Information Technology - Wuxi Venus Information Technology is an amateur radio devices dealer in China, source for high end, high performance RF products,Control products,APRS products and Commercial products. It provides a variety of solutions to the antennas systems, APRS,electronics kits and electronics components
    [ Hits: 142 | Votes: 0 | Rating: 0 ]
Software : Antenna analysis
  • Small Loop Antenna Calculator by KY8D - A free Labview antenna calculator program. This interesting calculator for small loop antennas can be ran on most recent Windows versions using the Labview runtime.
    [ Hits: 272 | Votes: 2 | Rating: 5.5 ]
Software : Satellite tracking
  • HamGPS - Display your current Maidenhead locator with 10 digit precision. It also computes bearing and distance to a set of target locations using locator or latitude / longitude. Useful to align antennas in VHF / UHF / microwave DX activities. No network or fancy maps usage, so it can be used even in remote locations.
    [ Hits: 281 | Votes: 1 | Rating: 7 ]

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