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l antennas

1361 links - and 47 categories

Antennas : 10M Antennas : 20M : 20 meter Yagi antennas
  • 2 element Yagi for 20 meter - This antenna was designed for the CQ WW CW 2009 at EA8URL. All elements are made out of fishing rods with an insulated copper cable fixed on the rods by cable ties. Both fishing rods and cable are UV resistant.
    [ Hits: 460 | Votes: 1 | Rating: 8 ]
Antennas : 6M : 6 meter Yagi Antennas
  • 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: 107 | Votes: 2 | Rating: 6 ]
  • 3 Elements Yagi LFA for 50 MHz - A short 3 element LFA Yagi for 50MHz with a 1.94M boom. This antenna has been designed in order to minimise the upward and downward lobes typically seen the the EL plane on Yagi antennas.
    [ Hits: 159 | Votes: 2 | Rating: 8 ]
Antennas : Active
  • PA0RDT Active Antenna - Active antennas can be very useful, in particular they can help reduce local electrical noise by allowing the antenna to be installed in a corner of the garden well away from house wiring. The original PA0RDT antenna uses a very small patch for the antenna and relies on the antenna being installed quite high.
    [ Hits: 263 | Votes: 0 | Rating: 0 ]
Antennas : Bazooka
  • Double Bazooka - Build a double bazooka antenna. This website offers pictures and diagrams of bazooka antennas for all Bands, from 6m to 160m
    [ Hits: 256 | Votes: 2 | Rating: 5.5 ]
Antennas : Beverage
  • A Reversible Beverage at ZL3IX - How do two-wire reversible direction Beverages work, an excellent document that explains fundamentals of beverage antennas.
    [ Hits: 334 | Votes: 0 | Rating: 0 ]
Antennas : CobWeb
  • The Morse Sagas: Cobweb Antennas - Useful tips on building cobweb antennas. Since I've done so many posts on the Cobweb antennas I thought it best to separate them on a different page so that potential Cobweb builders can see all the posts together. Hopefully this will make planning and building easier.
    [ Hits: 201 | Votes: 0 | Rating: 0 ]
Antennas : Dipole
  • Short Monoband Dipole Antennas - KGD Antennas - The KGD antenna is an option for those with space restrictions. The idea behing this project is to provide a short dipole antenna for HF Bands and to allow operations on HF bands when its not possible to setup large antennas, using these short base loaded dipoles.
    [ Hits: 221 | Votes: 0 | Rating: 0 ]
Antennas : J-Pole
  • Exploring The J-Pole Antenna - The J-Pole antenna is a common omnidirectional antenna used in amateur radio, particularly on the VHF and UHF bands. This article is an attempt to explore how the J-pole antenna transforms feed-line impedance to free-space impedance, all the while providing gain found only in the more expensive commercial products.
    [ Hits: 122 | Votes: 0 | Rating: 0 ]
  • Construction of a J-Pole antenna for 2 meter - If you like building good antennas, this one is for you. The J-pole is a slim, omnidirectional, half-wave antenna fed at the end through a quarter-wave shorted transmission line. Its predecessor is the famous Zepp antenna developed for the Zeppelin airship.
    [ Hits: 216 | Votes: 1 | Rating: 10 ]
Antennas : Multiband
  • Backyard Multi-Band Wire HF Antennas - My Top Five Backyard Multi-Band Wire HF Antennas. A selection of the top 5 HF wire antennas for the backyard and for multi-band operation
    [ Hits: 542 | Votes: 3 | Rating: 8 ]
Antennas : NVIS
  • Portable NVIS Loop for 80m to 40m - A portable (15.5 foot diameter) NVIS loop for 3.5 to 7.3 MHz. Performs well at high and low takeoff angles, and has smaller footprint than most NVIS antennas.
    [ Hits: 265 | Votes: 0 | Rating: 0 ]
Antennas : Portable
  • HF Field Day Antenna Ideas - Have you ever thought of setting up a portable HF station for an activity like the Field Day ?
    [ Hits: 209 | Votes: 0 | Rating: 0 ]
Antennas : Theory
  • Practical Antenna Modeling with 4NEC2 - Presentation about Practical Antenna Modeling Using the NEC Codes with examples of HF wire antennas and 4NEC2. How to define and edit the models, Running the simulations, Work some examples, Variables usage, Deal with Feed Lines and ground
    [ Hits: 319 | Votes: 0 | Rating: 0 ]
Antennas : Traps
  • Tuning Antenna Traps - The problem with making your own trapped HF antennas is usually getting the coaxial traps tuned to frequency. This article explains a method using a RF signal generator at +10dBm output into the coaxial trap.
    [ Hits: 232 | Votes: 2 | Rating: 6.5 ]
Antennas : ZS6BKW
  • Revisiting the GR5V and ZS6BKW Multi-band Antennas - NEC models are used to explore the GR5V and ZS8BKW optimizations. A third optimization is also rediscovered. The effect of fixed lengths of 75 ohm coax are explored. A link to the NEC model is provided.
    [ Hits: 249 | Votes: 1 | Rating: 10 ]
Operating Modes : Portable Operations Radio Equipment : Reviews and Comparisons
  • Ham and CB Radio - Web site dedicated to articles relating to Ham and CB Radios and antennas, reviews and classifieds.
    [ Hits: 142 | Votes: 3 | Rating: 10 ]
Technical Reference : SWR Meters
  • WiFI vSWR Meter - When building antennas for the Wifi band (Like the 8dBi omni), a need for an easy way to check the antennas arose. A Voltage Standing Wave Ratio (VSWR) meter useable at the 2.4GHz band is however, hard to find.
    [ Hits: 108 | Votes: 2 | Rating: 3.5 ]

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