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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 ]

• Bazooka antennas at towertalk - Posts about bazooka antennas at towertalk mailing list
  [ Hits: 2478 | Votes: 1 | Rating: 10 ]

• A Field Guide to Simple HF Dipoles - A scanned PDF of this interesting book on HF Dipole antennas published by Stanford Research Institute
  [ Hits: 1284 | Votes: 1 | Rating: 8 ]

• What is Horn Antenna - Horn Antenna - The energy of the beam when slowly transform into radiation, the losses are reduced and the focussing of the beam improves. A Horn antenna may be considered as a flared out wave guide, by which the directivity is improved and the diffraction is reduced. One of the first horn antennas was constructed in 1897 by Bengali-Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C. Southworth. This Horn model antenna is suitable employed in the UHF or SHF radio bands. Making this horn model antenna it will be easy for a beginner to make if it works in the 10GHz frequency, because small dimensions so it is not so difficult and also offers gain up to 25dBi.
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• Stealth Antennas: Indoor antennas - 8Mb pdf file containing a presentation made to the KC DX Club on stealth antennas. In search of maximal performance indoor antennas by AC0C Jeff Blaine
  [ Hits: 1372 | Votes: 1 | Rating: 1 ]

• The DBJ-1 VHF-UHF Dual Band J-Pole - Searching for an inexpensive, high performance dual band base antenna for VHF and UHF ? Build a simple antenna that uses a single feed line for less than $10.
  [ Hits: 6293 | Votes: 5 | Rating: 6 ]

• A Compact and Stealthy Field Portable Antenna - In the quest for an ideal field portable antenna, the author recounts experiments involving various wire configurations. While a previous candidate, a 41ft random wire, proved effective but lacked stealth, the search led to a surprising rediscovery of a design previously rejected—the Rybakov Antenna. With a focus on simplicity, rapid deployment, and multiband capability, the author explores the versatility of a 26ft Rybakov, avoiding the halfwave trap. The article delves into the antenna's performance and its potential as a discreet, resonant solution for field operations, addressing the challenges encountered during a POTA activation. Additionally, the Unun/Balun design used in conjunction with the Rybakov Antenna is discussed, providing insights into achieving a balanced system.
  [ Hits: 153 | Votes: 1 | Rating: 1 ]

• Guy Cables - Some information from a research into guy cables to support antenna tower modeling efforts.
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• Antenna Tuner Basics - In search of the perfect antenna - An article that explain with simple concepts and basic theory the correct usage of antenna tuners. It covers some aspects of common questions newcomers have on what antenna tuners are for, and what antenna tuners will never do.
  [ Hits: 476 | Votes: 0 | Rating: 0 ]

• Joe Tracker Ham Radio eBay Auction Price Tracker - Ham radio equipment eBay prices, adjusted for trends, filtered for accessories, leaving only condition and auction terms to affect the final price. Also direct links to auctions, searches and recommended sites for research, plus amateur radio station rigs, projects and antenna farm.
  [ Hits: 1122 | Votes: 3 | Rating: 9.67 ]

• YouTube : AO-51 Videos - Videos of AO-51 operations. Randy K7AGE has produced a number of practical and useful videos including good info on a minimal antenna setup for AO-51 reception.
  [ Hits: 1579 | Votes: 2 | Rating: 6.5 ]

• LF antennas - Welcome to our line of Low Frequency, Natural Radio Research, Broadcast, Marine and Shortwave products. Our evolving product line is the result of our dedicated research efforts primarily in the areas of LF, VLF, MF, and HF.
  [ Hits: 311 | Votes: 0 | Rating: 0 ]

• RDF Antennas - This site serves a community of volunteer and paid professionals in Search & Rescue and Civil Air Patrol who save lives and Amateur Radio enthusiasts who use DF skills as a hobby. We provide antennas and other resources for people in these fields.
  [ Hits: 1003 | Votes: 0 | Rating: 0 ]

• CAL-AV Labs, Inc. - Cal-av labs, inc. (formerly california avionics laboratories, inc.) manufactures electronic instruments and systems for research and industry. we specialize in radio communications and research/electronic test products. Amateur radio yagi antennas, rotary dipoles, baluns, morse keys.
  [ Hits: 2129 | Votes: 0 | Rating: 0 ]

• Radio Clip Art pictures - Royalty free clipart and pictures about radio and antennas
  [ Hits: 9254 | Votes: 4 | Rating: 7.75 ]

• Yeggi 3D printable Models for Ham Radio - Yeggi search engine results for amateur radio 3d printable models. If you are looking for 3d ham radio parts like loading coils, stands for radio, cases, antenna insulators and antenna supports here you will find many ready to use 3d models
  [ Hits: 259 | Votes: 0 | Rating: 0 ]
• 3D Ham Radio Antenna models Thingiverse - Ham Radio 3D Models published on Thingiverse, includes several parts for homebrewing amateur radio antennas, like spreaders, isolators a and mounts, wire antenna winders, adapters and many other accessories useful to antenna homebrewers.
  [ Hits: 345 | Votes: 1 | Rating: 10 ]

• Antenna analyzer with Arduino - HF Antenna analyzer with Arduino Nano, open software has also become a commercial product
  [ Hits: 12879 | Votes: 21 | Rating: 3.9 ]