rf antennas

rf antennas

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• 160 meter low noise antennas experiments - VE7CA experiments on 160 meters band antennas, looking for better performances on reception.
  [ Hits: 3057 | Votes: 1 | Rating: 1 ]

• How to Make a Great 9:1 RX Transformer - There are lots of good designs for matching transformers for receiving antennas. Make it yourself it's cheap and easy, and very high performance. This is the design used in the TRX-9 transformers.
  [ Hits: 3143 | Votes: 0 | Rating: 0 ]

• HF Antenna Switch - The purpose of this remote antenna switch was to be able to select between four different antenna combinations The unit was designed to work at RF power levels of around 100 watts by G8JNJ
  [ Hits: 954 | Votes: 0 | Rating: 0 ]

• Homebrew RF chocke - Magnetic Longwire Balun - RF Choke to prevent hf currents on the feedline. This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.
  [ Hits: 3415 | Votes: 3 | Rating: 10 ]

• Shortened antennas - Drawings of shortened antenna for indoor usage, using short pvc tubes for 2 , 20 and 40 MHz by f1rfm
  [ Hits: 6848 | Votes: 3 | Rating: 4 ]

• Designing Log Periodic Antennas - By Dr. Glen Dash, Ampyx LLC
  [ Hits: 5070 | Votes: 5 | Rating: 7.2 ]

• Magnetic loop antennas - Drawing and plan for an HF magnetic loop antenna
  [ Hits: 1508 | Votes: 2 | Rating: 9 ]

• Petlowany Antennas by K6NO - WorldRadio Article on Petlowany antennas base on this principle: if a length of wire is wound into a spiral-shaped coil and excited by a radio frequency current connected to the innermost portion of the coil, it will then, and only then, exhibit RF characteristics that closely approximate those of a resonant linear wire of the same length
  [ Hits: 3765 | Votes: 9 | Rating: 6.22 ]

• VHF antennas, construction and use - Article by VU2GT about VHF antennas, how to evaluate performances and models.
  [ Hits: 994 | Votes: 0 | Rating: 0 ]
• Basics of antennas - The current, the voltage, the impedance, the bandwidth, the polarization, and how the earth influences the famous radiation pattern.
  [ Hits: 701 | Votes: 0 | Rating: 0 ]
• The mystery of radials - Effect of radials on the efficiency of antennas.
  [ Hits: 368 | Votes: 0 | Rating: 0 ]

• D3 Antenna for Field Day - D3+ High Performance Antennas for Field Day. This article describes versatile broadband wire antennas. These antennas will double your effective radiated power over a dipole, will be easy and inexpensive to build and install, and will be simple to match.
  [ Hits: 2643 | Votes: 7 | Rating: 4.86 ]

• Passion RadioAmateur 2.0 - French Blog about amateur radio and new technologies, Internet, Hyperfréquences (SHF), DX Radio et Contests, Antennas and Videos by F1JXQ
  [ Hits: 355 | Votes: 0 | Rating: 0 ]

• Microset - Power supplies, rf power amplifiers, dummy loads, frequency counters, repeaters antennas manufacturer based in Italy
  [ Hits: 1829 | Votes: 1 | Rating: 1 ]

• Big Hair's Antennas - High Performance, HF, CB, base and mobile antennas
  [ Hits: 809 | Votes: 1 | Rating: 10 ]

• ROLCON RF Systems - High quality VHF/UHF Yagi (directional) antennas
  [ Hits: 1064 | Votes: 0 | Rating: 0 ]

• RFS - Radio Frequency Systems (Formerly Celwave, Cellwave, Cablewave),Wifi antennas, duplexers.
  [ Hits: 477 | Votes: 0 | Rating: 0 ]

• LAM Communications - Icom Kenwood Yaesu MyDel dealer, offer a wide range of ham radio products, transceivers, antennas, rotators, microphonrs, aerials, dummy loads, rf amplifiers and scanners based in UK
  [ Hits: 1347 | Votes: 2 | Rating: 7 ]

• RF Stuff - Online shop for two way radio communications and amateur radio products, antennas, coax and cables, adapters and mounts, accessories and audio parts
  [ Hits: 944 | Votes: 1 | Rating: 10 ]

• Integrated Engineering Software - Electromagnetic CAE simulation software for modeling and analysis. RF, Microwave & Antennas
  [ Hits: 1686 | Votes: 4 | Rating: 8.75 ]

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