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The Quadlong antenna for the six meter band. This antenna feature a total gain of 6,4 dBd, F/B 21 dB and is also available in 70MHz version. Includes detailed pictures and plot diagrams. -
The utility "NEC-2 for MMANA" is intended for calculation of antenna models made and optimized in program MMANA and for construction and simulation of antenna models using input language NEC-2 and based on MMANA models. -
A DIY project of a WiFi 10 elements Yagi antenna -
Building a 2 metre 144MHz VHF Yagi beam antenna, designed for portable use. -
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Accurately determining an antenna's feedpoint impedance is crucial for optimal performance, especially when experimenting with new designs or making adjustments. While SWR meters provide basic information, a full complex impedance measurement reveals the resistive and reactive components, which are essential for proper matching. Modern antenna analyzers, like the _Palstar ZM30_ or MFJ259B, simplify this task, but measurements taken through a transmission line require careful interpretation due to impedance transformation. This resource details a calibration method to precisely account for the effects of the feedline. It explains how a transmission line can significantly alter the measured impedance, illustrating this phenomenon with a Smith Chart example where an 80m antenna's [22 + j6] Ohms feedpoint impedance transforms to [82 + j45] Ohms after a 10m line. The guide demonstrates using a transmission line calculator applet, such as the one by W9CF, to reverse this transformation. It outlines the process of calibrating a specific length of RG174 coax, showing how an initial 26ft estimate was refined to **25.85ft** to accurately predict a known 22 Ohm load, significantly improving accuracy over uncalibrated results. -
A 21 MHz Four Square Beam Antenna This popular antenna for the lower bands, can also work well on 15 meters, QST Article -
An homemade portable trapped dipole antenna for 40 and 80 meters band with an optional extension for the 20 meters. -
A method for supporting a balun on a Chushcraft A3S antenna. This allows the balun to be isolated from the boom, thus reducing the effect of introduction of reaction with the balun core. -
A 4 elements handitenna for 70 cm band. This is my version of the K5OE Handitenna. This one is a four Element instead of three, as I had less of a crunch on space than he did. The 1st three elements (Reflector, Driven Element, and Director 1) are the same dimensions as his were. -
Dedicated to State-of-the-Art lightweight portable radio. Sotabeams produces and sells amateur radio products dedicated to ham radio portable operations. Antennas, supports and masts, filters, wires and more accessories for amateur radio. -
This max size magnetic loop antenna for 14 MHz with a totall circumference of 6m is designed to attach to a wall -
Antenna experiment a Delta loop antenna for 7 Mhz band -
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Rotator controller, azimuth & elevation control of rotators (automatic antenna turning) based on commands from computer. A project by Pavel VACHAL and OK1DX - KF9VM -
Adding extra directivity to the Moxon Rectangle for 6m, 4, and 2m -
A javascript online calculator for popular wire antennas, from the standard easy to build flat-top dipole, to the inverted V dipole, but also the Quad Loop, and the equilateral delta loop antenna -
This article describes a simple Inverted L antenna for the HF bands designed to work on 80m, 40m, 30m and 20m -
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Make your own loading coils for antenna projects using Caterpillar Grommet strips. -
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Centre fed half wave dipoles make great, simple and effective antennas for the HF bands. Sometimes however, the centre feed is not ideal. This great project will improve the overall antenna performance. -
Located in southern Ontario Canada, supplier for HF VHF antenna kits, aluminium tubing, portable j-pole antennas, lightning suppressors, connectors and adapters -
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Ferrite rod antenna or aerial, a form of RF antenna that is widely used in RFID and transistor radio applications. -
An home made Butternut HF9V clone antenna by OH2GVB -
A 70cm and 2m 6 elements yagi antenna plan based on the IEEE Transactions on Antennas and Propagation -
Extension to an existing fan dipole originally modeled for 40 20 and 6 meters. This modification will add 80 15 and 10 meter bands. -
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An easy portable VHF antenna to build for ARES - RACES work is the 300 Ohm Twin Lead JPole antenna -
a methodology for connecting multiple LF/MF/HF receivers to a single antenna via readily available and inexpensive 75-ohm TV cable. -
An end fed 20 meter half wave antenna -
The Folded Dipole is not used much amongst Radio amateurs, probably due to the fact that this antenna uses twice as much wire as a single-wire dipole. -
3 band mobile antenna - 10m full size wave/4 whip - quick tilt-down system for 20 and 15 m loading coil change by IZ7DJR -
VHF UHF diplexer by G8MNY -
A moxon rectangle for 50 Mhz band -
This is the Loop Antenna Group to Ask Your Questions, Get Answers and Information about Loop Antennas for improved your Radio Listening and Enjoyment. -
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Canadian dealer, specializes in supply and installation of free-standing towers for commercial and amateur radio use. We also supply ham transceivers, antennas, rotors and accessories. -
The Fence Fan Dipole a quick, easy and inexpensive multiband dipole antenna -
Your source for weather radios, communication headsets, 14 channel radios, M&M groovy radios, smithsonian crystal radio and weather station kits, line restrictors, antennas,ham radio accessories, and battery products. -
Comparison of 50 and 70 Mhz antennas, commercial and home made projects -
A Slinky-based doublet or loaded vertical QRP antenna tested for 40 meters band -
A homebrew Magmount for 2m antenna -
Lot of useful information on experiments on 136 Khz band, with antenna tips DSP infos and notes on their activity in LF. -
This antenna analyzer measures complex impedance over the 1.6 - 33 MHz HF spectrum -
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Interesting article on multiband fan dipoles. This article give an overview on designing this wire antenna, and planning a robust installation and proper feed line. Includes notes on setting up a commercial fan dipole antenna and on how diy your own. -
Collection of telegraph keys homebrew antenna projects links to radio software