how to use an antenna an

how to use an antenna an

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• Baluns: What they do and how they do it - Article on Baluns and how they works, what Problems are Baluns supposed to Solve, Causes of System Imbalance from ARRL Antenna Compendium by W7EL
  [ Hits: 1572 | Votes: 3 | Rating: 6.7 ]
• 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: 3144 | Votes: 0 | Rating: 0 ]
• 50:450 Ohm (9:1) Balun for vertical antennas - A page describing how to home made a custom 9:1 balun for a common portable wire antenna. The author suggest to use 4C65 or FT140-61 toroids instead of the common Amidon T200-2
  [ Hits: 516 | Votes: 11 | Rating: 6.72 ]

• Loading Coils for 136 kHz - This page starts by showing how to make loading coils for LF, and goes on to describe two of the loading coil assemblies used to resonate the experimental vertical antenna used at GW4ALG.
  [ Hits: 429 | Votes: 1 | Rating: 4 ]

• The End-Fed Half-Wave Antenna - Presentation - A very well done presentation about End-Fed Half-Wave antennas. This PDF document contains a summary of experiences in how to build custom EFHW antennas. Includes an interesting comparison table of UnUn configurations with recommended toroids, Wire size, turns and capacitors. An useful recap on common errors in building homebrew EFHW Ununs completes the document.
  [ Hits: 406 | Votes: 3 | Rating: 8.67 ]

• How to straighten Microbore copper tube - Article and video showing a technique to straighten Microbore copper pipe that is useful in antenna construction. This technique has been implemented to build a Quadrifiliar Helix antenna.
  [ Hits: 326 | Votes: 0 | Rating: 0 ]

• A Cheap Indoor Dipole for 80m-15m - NC4JB Josh explain in this article how to setup a simple and cheap indoor dipole antenna that can be used on almost all HF bands
  [ Hits: 4531 | Votes: 8 | Rating: 6.37 ]

• Magnetic Loop for the 2m band - Such kind of omnidirectional antenna gives the possibility to be QRV with horizontal polarisation, as commonly used for the CW and SSB section of the 2m band. This actual design shows a 1.3:1 bandwidth of about 150kHz, centered to 144.200MHz.
  [ Hits: 573 | Votes: 1 | Rating: 10 ]

• Super AM Antenna - How to build a super AM antenna, These plans have been used by many people, with good results.
  [ Hits: 1611 | Votes: 4 | Rating: 8 ]

• VHF antennas, construction and use - Article by VU2GT about VHF antennas, how to evaluate performances and models.
  [ Hits: 995 | Votes: 0 | Rating: 0 ]

• Antenna Gain to ERP - A radio's transmitting power can be concentrated along the horizon by use of a GAIN antenna. Although you may still be transmitting with four watts of power, your effective radiated powerwill be greatly increased. This table shows the effects of antenna gain on a transmitter with 4 watts of transmit power.
  [ Hits: 1386 | Votes: 4 | Rating: 4.5 ]

• How to make a gamma match - how to make a gamma match for a antenna. The Gamma match is the most used matching device used for yagi beams.
  [ Hits: 1464 | Votes: 8 | Rating: 5.38 ]

• VHF Yagi from Old TV Antenna - 6m/2m/70cm Yagi Antenna Built from Old TV Antenna This turned out to be a great little antenna. It works the 6 meter, 2 meter and 70 centimeter bands. You can use one common feedpoint or two seperate feedpoints depending on how you would like to connect this antenna to your transceiver.
  [ Hits: 731 | Votes: 2 | Rating: 10 ]

• The UHF Bicycle Antenna - Homebrewing a UHF antenna to be used on a bicycle. This simple project gives you the right hints on how to build and setup and install a 70cm antenna on a bicycle.
  [ Hits: 192 | Votes: 0 | Rating: 0 ]

• A slingshot antenna launcher - How to build a slingshot antenna launcher. Slingshot antenna launchers are used to launch a line over a tree branch, so antennas can be suspended from high up trees
  [ Hits: 1189 | Votes: 4 | Rating: 4.5 ]

• Arduino Antenna Rotator Controller - This is an attempt to build an Antenna rotator controller using Arduino Mega 2560 with a nice user interface showing the actual position of the antenna.
  [ Hits: 2339 | Votes: 14 | Rating: 6.71 ]

• Noise Canceller Project - This project was intended to accompany the stealth antenna project. Author want to see how effective a noise canceller could be in reducing the background noise floor when attic / stealth antennas are being used.
  [ Hits: 709 | Votes: 0 | Rating: 0 ]

• A Homebrew Antenna used for RFI Direction Finding - How to homemade antenna to be used with a handheld on the aircraft band to locate noise sources
  [ Hits: 486 | Votes: 3 | Rating: 7.67 ]

• HF Antenna Analyzer - This article explain how to homebrew and use an HF antenna analyzer by simply adapting a Windows PC, micro-controller and a DDS evaluation board by K6BEZ
  [ Hits: 1472 | Votes: 3 | Rating: 6.33 ]
• miniVNA PRO Modifications - The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.
  [ Hits: 136 | Votes: 5 | Rating: 7.8 ]

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