owen duffy

owen duffy

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• Four over Four for 144MHz
  
  This article describes the 144MHz horizontally polarised antenna at VK1OD in November 2008 The antenna ...
  [ Hits: 1970 | Votes: 1 | Rating: 1 ]

• Trapped dipole for 80 and 40 m
  
  This article explores a theoretical model for the losses of an 80m 40m trapped inverted ...
  [ Hits: 2731 | Votes: 0 | Rating: 0 ]
• 7 MHz Dipole at VK1ZKD
  
  This article documents an unobtrusive antenna for operation on 7MHz primarily for contacts with stations ...
  [ Hits: 3516 | Votes: 0 | Rating: 0 ]

• Antenna wire catenary calculator
  
  This is a simple calculator for solving the antenna wire catenary between to end points ...
  [ Hits: 2898 | Votes: 8 | Rating: 2.75 ]
• RF Transmission Line Loss Calculator
  
  This calculator computes the matched line loss for a transmission line using a model calibrated ...
  [ Hits: 2508 | Votes: 18 | Rating: 3.94 ]

• Practical Guanella 1:1 balun
  
  This article proposes a lossy transmission line model of a practical Guanella 1 1 balun ...
  [ Hits: 3619 | Votes: 3 | Rating: 3.33 ]
• Guanella 1:1 VHF choke balun
  
  A model of a Guanella 1:1 VHF choke balun using a FT140-61 core
  [ Hits: 3621 | Votes: 9 | Rating: 3.11 ]

• A model of a practical Ruthroff 1:4 balun
  
  The 1 4 balun is of particular interest because it underlies many other configurations and ...
  [ Hits: 4273 | Votes: 7 | Rating: 3.43 ]

• Double Bazooka Antenna performance
  
  The Double Bazooka Dipole is a half wave dipole with an attempt at compensation of ...
  [ Hits: 3163 | Votes: 3 | Rating: 4.67 ]

• A model of the W2DU 1:1 choke balun
  
  Notes on making the W2DU choke balun by placing several ferrite sleeves around a coaxial ...
  [ Hits: 9719 | Votes: 7 | Rating: 2.29 ]

• Feeding a G5RV
  
  Feeding a G5RV Overview by VK1OD
  [ Hits: 2493 | Votes: 0 | Rating: 0 ]
• G5RV Optimization
  
  Optimising a typical G5RV antenna by VK1OD
  [ Hits: 1559 | Votes: 1 | Rating: 10 ]

• Novel Gamma Match Construction
  
  A novel approach to contruction of a gamma match.
  [ Hits: 1288 | Votes: 2 | Rating: 5 ]

• An antenna for 7MHz local contacts
  
  This article describes the design of an antenna for local contacts on 7MHz including a ...
  [ Hits: 2548 | Votes: 2 | Rating: 2 ]

• VK1OD Blog
  
  A collection of articles related to my pursuit of the hobby of Amateur Radio ...
  [ Hits: 493 | Votes: 2 | Rating: 10 ]

• Australian amateur population trends 1998 - 2007
  
  Over recent years the number of issued amateur licences has been declining the trend was ...
  [ Hits: 723 | Votes: 1 | Rating: 10 ]

• DL6WU Long boom Yagi design tools
  
  This is an Excel spreadsheet template to design DL6WU Yagi antennas
  [ Hits: 1980 | Votes: 23 | Rating: 7.39 ]

• Roger Beep
  
  This article describes a simple device to generate Roger Beep tones.
  [ Hits: 1634 | Votes: 5 | Rating: 6.6 ]

• Broadband over power lines
  
  VK1OD informations on BPL
  [ Hits: 446 | Votes: 0 | Rating: 0 ]
• Are you ready for BPL
  
  Broadband over power lines BPL is a technique for transmission of high speed data broadband ...
  [ Hits: 672 | Votes: 0 | Rating: 0 ]

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