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Antennas : 40M : 40 meter Dipole Antennas

• Half-Length Dipoles for 40 Meters - Complete collection of the four main parts of this excellet research on modelling and designing half wave dipole antennas for 40 meters band, covering all aspects beginning from full wave length antennas, to shortened, loaded and reshaped dipoles
  [ Hits: 383 | Votes: 2 | Rating: 10 ]

• 6 Elements Yagi Antenna on 50 MHz - This is a design based on the QuickYagi 4 software by WA7RAI with some changes for practical reasons. The beam uses 6.5 metres of standard 25mm square boom, 12mm diameter elements without tapers. The actual boom length used is 6.3 metres and all parts are readily available.
  [ Hits: 134 | Votes: 2 | Rating: 6 ]

• 20m Half-Wave End Fed - A Half wave antenna has a high impedance feed point. This can be matched using a 1/4 wave stub matching section and converts the 40m vertical into an L-shaped 20m J-Pole antenna. The 300 ohm feeder used for this purpose must be kept away from the ground.
  [ Hits: 1845 | Votes: 7 | Rating: 8 ]

• Feed Line Currents for Neophytes - This paper discusses the sources of feed line currents and the methods used to control them.
  [ Hits: 341 | Votes: 0 | Rating: 0 ]

• 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: 543 | Votes: 2 | Rating: 7 ]
• Folded Dipoles in Yagi Uda Antennas - A folded dipole is an antenna, with two conductors connected on both sides, and folded to form a cylindrical closed shape, to which feed is given at the center.
  [ Hits: 314 | Votes: 2 | Rating: 4.5 ]

• Mapping the Australian Radio Landscape - Discover a comprehensive solution for mapping Australian ham radio entities using data from the ACMA Public Register. This tool, developed in Delphi 7, generates KML files for Google Earth, showcasing repeaters, beacons, and operators across different prefixes. While respecting privacy regulations, the files provide valuable insights into the amateur radio landscape.
  [ Hits: 52 | Votes: 0 | Rating: 0 ]

• Amateur Radio Station Log Sheet in A4 Format - A free to download and print, log sheet in A4 paper format for amateur radio stations
  [ Hits: 4157 | Votes: 42 | Rating: 7.68 ]
• Amateur Radio Station Log Sheet in US Letter Format - A free to download and print, amateur radio station log sheet in a paper US letter format
  [ Hits: 5573 | Votes: 35 | Rating: 8.33 ]

• Amateur Service Spectrum Requirements at 7 MHz - An information paper by the International Amateur Radio Union. The amateur service seeks the return to an exclusive, worldwide allocation of no less than 300 kHz in the vicinity of 7 MHz.
  [ Hits: 94 | Votes: 5 | Rating: 10 ]

• Log Sheet for Portable Operations - A free to download and print, paper log sheet useful for portable amateur radio operations, in a PDF file.
  [ Hits: 1538 | Votes: 5 | Rating: 5.2 ]

• Printable Log sheet for SWL - A free to download and print, paper log sheet for shortwave listerners in PDF format.
  [ Hits: 3293 | Votes: 17 | Rating: 6 ]

• Reducing Internet Router Noise on 6 Meters - Slaying the grim reaper of internet router noise on 6 meter
  [ Hits: 629 | Votes: 0 | Rating: 0 ]