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357 links - and 7 categories

20m delta loop ^pop - This antenna is fed for vertical polarisation, to give a low angle of radiation for DX and also a nearly omni-directional radiation pattern.
[ Hits: 65721 | Votes: 69 | Rating: 6.71 ]

50MHz J-Pole Antenna ^pop - Need a general purpose antenna on the magic band? The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarised antenna without the need for a ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.
[ Hits: 33823 | Votes: 18 | Rating: 7.05 ]

Comparison of Beverage antenna - A ranking of receiving antennas based on noise being evenly distributed in all directions. These rankings are most accurate in the frequency range of AM broadcast, 160 or 80 meter bands
[ Hits: 2855 | Votes: 2 | Rating: 6.5 ]

J-Pole theory ^pop - The J-Pole antenna is an omnidirectional antenna that can be used for base, mobile and field day stations. It does not need a ground plane, radials or a complicated matching system. The J-Pole can be cheaply, simply and quickly constructed using a variety of techniques, some of which are discussed in this article.
[ Hits: 30319 | Votes: 26 | Rating: 6.87 ]
HF J-Pole antenna - A Simple Nondirectional Antenna for Ten Meters QST February 1950, Easy to build J-Pole antenna for restricted space.
[ Hits: 6616 | Votes: 3 | Rating: 3 ]

The Lindenblad Antenna: The Ultimate Satellite Omni Directional Aerial - This Antenna project is a bit more complex than other omni antennas for satellite use, but it is much easier and cheaper than a standard tower mounted circular polarized azimuth and elevation rotating beam system.
[ Hits: 442 | Votes: 5 | Rating: 6.8 ]

Cebik Moxon Rectangles - The Moxon Rectangle is growing in popularity as a compact 2-element array that approaches a full-size 2-element in gain but with a far superior front-to-back ratio and a direct match for the standard 50-Ohm coaxial cable.
[ Hits: 3331 | Votes: 5 | Rating: 5 ]

Build your first dipole - The dipole antenna is an easily designed and made antenna usually used on HF, although can be (and sometimes is) made for VHF and UHF antennas, and in varying forms is also used as part of different designs of antennas i.e. as the driven element for directional antennas.
[ Hits: 14809 | Votes: 14 | Rating: 6.93 ]

Islands, Castles and Portable Operations - Island DXpedition and portable operations, including present, up-and-coming operations, IOTA, NON-IOTA, IOSA, IIA, ILIA, DIB, Lighthouse, and other Island Award Program operations
[ Hits: 885 | Votes: 0 | Rating: 0 ]

TX RX Systems Inc - TX RX Systems Inc. manufactures signal boosters, rf antennas, transmitter combiners, cell enhancers, land mobile radios, duplexers, receiver multicouplers, bidirectional amplifiers, bda, rf amplifiers, rf filters, rf cavity filters, rf combiners, rf components, in building rf coverage, repeaters, repeater amplifiers, rf management equipment, rf systems, and rf solutions. TX RX Delivers Reliable Solutions.
[ Hits: 1640 | Votes: 5 | Rating: 4 ]

Dawicom - Manufacture of microwave directional, omni directional, sector and multisector antennas with horizontal polarization for ISM band 2,4 GHz
[ Hits: 805 | Votes: 0 | Rating: 0 ]

ATV-TV.org - Welcome to the Amateur Television Directory, the source for finding sites related to Amateur Television and Ham Radio. Find out where Amateur Television is being used in your state or country.
[ Hits: 1087 | Votes: 1 | Rating: 7 ]

PB 2 Radio Direction Finding - info on radio direction finding
[ Hits: 873 | Votes: 0 | Rating: 0 ]
Polish radio direction finding - IARU region 1 RD championship
[ Hits: 651 | Votes: 1 | Rating: 3 ]
Radiopejlorientering - Radio Direction Finding - The Swedish ARDF page is mainly presented in the Swedish language, but some articles are in English.
[ Hits: 641 | Votes: 0 | Rating: 0 ]

Transmitter hunting, in San Francisco - Amateur radio direction finding, transmitter hunting. triangulating a radio signal direction and plotting its bearing on a map. hunters use doppler systems for tracking hidden transmitters
[ Hits: 497 | Votes: 0 | Rating: 0 ]

LocCalc - Distance and directions calculation program using both Spheric, the perfect round earth model, and Vincenty's inverse ellipsoid algorithm, the WGS 84 earth model.
[ Hits: 1573 | Votes: 5 | Rating: 3.6 ]
HamCalc - Add-in module to Microsoft Excel, contains a set of radio amateur relevant special functions: DistSphericLocator(Loc1; Loc2) Calculates the spheric earth model distance between two locators [km] DirSphericLocator(Loc1; Loc2) Calculates the spheric earth model direction from Loc1 to Loc2
[ Hits: 2245 | Votes: 3 | Rating: 3.67 ]

Morse Code Madness - A freeware windows based Morse Code program written in Visual Basic 6 with source code freely available! The program uses DirectX DirectSound for some features. You may download the source code and/or the executable at the bottom of the page.
[ Hits: 2944 | Votes: 4 | Rating: 3.25 ]

Gpredict - Gpredict is a satellite tracking program for Unix-like operating systems. In the begining (v. 0.1.x) Gpredict was just a GUI client to John Magliacane's excellent satellite tracking program, Predict, but due to performance problems it has been decided to include the tracking code directly into Gnome Predict (v. 0.2.0 and later).
[ Hits: 3566 | Votes: 8 | Rating: 9.25 ]