Homebrewing Techniques
Antenna construction notes
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Design and build your own Hf thru Vhf antennas.Contains pictures, plans, parts list of very popular ham antennas along with experimental types. -
Bill Orr W6SAI ham radio techniques. Improving ground connection, computer analysis of the antenna, modelling sample antennas pdf file -
Splitting an antenna between two receivers or in use as the phasing harness in stacked antennas where there is a need to equally split the power from the transmitter between two antennas -
Find out how much to adjust the length of a quarter wave whip or a half wave dipole rather than the outright cut-and-try method. -
Calculations for determining the wind loading stress on an antenna mast. Link to a spreadsheet for calculating the mast bending stress based on wind speed and antenna cross sectional area. -
Hints about Jpole Yagi and Quad antennas -
This device goal is to optimize homebrew antenna for the V/UHF band. This tool, is based itself on the simultaneously comparison between two antenna, directly in dB. by IK0BDO -
When experimenting on an antenna it's often important to determine its feedpoint impedance at various frequencies across the operating band. It's easy enough to measure SWR, but sometimes we need to know more detail than this -
Use this chart as an aid in trimming the length of your antenna. It gives you an idea of the change in wire length needed to move antenna resonance a specific number of KHz. -
Spider Beam antenna pictures in a youtube video -
Various publications through the years have shown how the SWR measured on a shorted (or open) feed line can be used to calculate feed line attenuation -
This page describes the design and construction materials W8WWV used to build a coaxial cable trap. A coaxial cable trap is a parallel resonant circuit that is usually inserted in an antenna element to enable multiband operation. -
Lots of information on fabricating CB antennas -
A center antenna insulator with feedline strain relief -
G3TXQ study on coaxial cable demonstrate that it can reduce an element's length by something approaching the Velocity Factor of the cable -
Putting up an antenna for the low bands? What kind of wire will you use? This analysis may change your plans. -
About foil conductors -
Simple wire antennas like dipoles and verticals are dead easy to make: here's how -
The design and feeding of driven elements for VHF/UHF Yagi antennas , modeling, observations and some case studies by Graham Daubney F/G8MBI -
A new and simple method for tuning traps. You need 2-3Watt of your TRX and two homemade coupling coils by DK7ZB -
Ferrite Toroidal Cores, Magnetic Properties of Ferrite Materials, EMI - RFI Suppression Design Considerations, Ferrite Beads, Ferrites for RFI Ferrite Cores for RFI Suppression by CWS ByteMark -
Make your own VHF/UHF folded dipoles from aluminium tubing. Learn tips for folding yagi, softening the tubing, bending jig and make all waterproofing -
Notes on homebrewing antennas by Chris G4CYA, from gamma matching, to phasing antennas, splitters and combiners, baluns and measuring techniques. -
Traps can be one way round multiband coverage without the need of an atu. Learn how to homebrew your own traps -
Cannot find the inductors you need for an antenna, a tuner or amplifier ? Build your own it is easy! -
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. -
Safety tips and troubleshooting ideas by K2ZS -
Installing your dipole end insulators, a beginner guide to proper setup wires to insultaors. -
Determine the K-Factor used as a multiplier when constructing half-wave antennas. -
Antenna designs that K5TR have collected from various sources. -
The webpage discusses metal fatigue in antenna elements for radio amateurs, offering construction tips and techniques. It covers theory, tricks, and the use of baluns and coils. -
Here is an easy method to mount elements to a boom, this can be realized at home, without the need of special tools -
Article about omega and gamma matching, related to bandwidth, loss and component failures, heating and power ratings -
The construction principles for open-sleeve elements in antennas -
How to build a phasing harness for stacking antennas -
Collection of different techniques to homebrew PVC yagi antennas, including elements assembling, baluns and chokes, radiator box tips and tricks by dk7zb -
Are the lengths of antenna radials related to the height of a vertical? By N6LF -
Green that aluminum into something useful right in your own backyard by WB2CQM -
An article by VE1VQ that illustrate how to home made a balanced feed line -
Simple, easy to built match developed in 1995 for Yagis with resistitive loads of 12.5, 18 and 28 Ohm. -
An antenna construction workshop conducted at Marshall N1FN's QTH -
An interesting article on traps, pros and cons of trapping by W4RNL -
Tuning HF Coaxial Antenna Traps -
Here is a way to ease assembly and balancing of a large antenna. The elements and boom are assembled separately in most cases. Once they are all together set up 2 tripods in the assembly area and put the boom on them. -
Using delta match with HF antennas design -
Antenna modelling techniques and examples by W4RNL -
How to make a Weatherproof Vertically Polarised Omnidirectional Aerial, The Slim Jim Antenna -
Sizes of wire as compared to their gauge American Wire Gauge by W8HDU -
KA7OEI article on homebrewing Yagi UDA antennas with practical suggestions and designing notes. -
Dragoslav Dobricic, YU1AW antennex article on influence of Boom on frequency performance and how compensate it -
One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom -
Homebrewing special insulators with PVC and copper corona rings -
Galvanic corrosion, a destructive process triggered by dissimilar metal contact in a corrosive electrolyte, poses a significant threat in antenna manufacturing. With aluminum and stainless steel components commonly involved, unaddressed corrosion can lead to white particle accumulation, causing long-term damage. Awareness of the galvanic series and the application of protective coatings like Alumslip can mitigate this pervasive issue, ensuring a prolonged antenna lifespan. -
This method of construction can be used on most UHF through \"low\" microwave Yagis, and is especially useful for the 33, 23 and 13 cm bands -
Why build antennas out of copper and not aluminum or stainless steel. Selecting the best metals for antennas evaluating the conductivity factor. -
Building an efficient antenna begins with selecting the right aluminum stock. This article provides a comprehensive guide to sourcing aluminum materials for antenna construction. It covers different aluminum grades, their tensile strengths, tempering options, and their suitability for various antenna components. The article also recommends reputable suppliers in the UK, making it a valuable resource for antenna builders seeking durable and high-performance materials. -
Converting a little Radio Shack CB mobile magnet mount antenna to a VHF ham radio antenna -
This DIY homebrew project provides a durable, weatherproof center connector for dipole antennas, ideal for HF setups like 40m wire dipoles or inverted-V designs. Made from PVC pipe and an SO-239 UHF connector, it ensures strong support and room for a current balun. With simple drilling and assembly, it offers a cost-effective alternative to commercial options. Perfect for amateur radio operators, this dipole antenna connector enhances performance while keeping costs low. A great solution for DIY antenna builders seeking reliability and longevity. -
This article provides a cost-effective and reliable method for fixing antenna elements in the traverse of HF/UHF Uda-Yaga antennas. It outlines a step-by-step process using soft galvanized steel wire, eliminating the need for special adapters or additional holes. The method described ensures a secure attachment without compromising the mechanical strength of the traverse, offering a durable solution for ham radio operators constructing antennas. The use of galvanized steel wire guarantees long-lasting stability, making it a practical and efficient technique for antenna assembly. -
This fixture id intended for fast assembly and disassembly of VHF antennas, expecially usefull for experimenters -
This document provides a detailed guide on constructing and mounting a folded dipol for the 146 MHz frequency in a vertical configuration to be used in Yagi antennas. The step-by-step instructions and diagrams included make it easy for hams to build and set up this type of antenna. Understanding and implementing this design can enhance the performance of radio communication for Amateurs operating in the 2-meter band. Whether you are looking to improve your signal strength or experiment with antenna designs, this resource offers valuable insights and practical information. -
Ham radio wire antennas are the most common form of antenna used by ham radio operators. Here you can find hints and tips on diy wire antennas -
Some techniques on homebrewing yagi antennas by VK5AJL -
A practical guide on hombrewing Yagi antennas, including notes on Driven Element, Transformation & Symmetrising Coax Lines, Full Boom length vs. electrical length, Elements & Insulators on Boom and additional tips and tricks, in English and German -
Learn How - Winding your own RF Choke, Inductor Winding instructions -
The Classic Numbers for All Types of Wire Antennas at HF. Wire antennas need to be made a bit long and cut to resonance. They are affected by height above the ground and surrounding objects. In order to get an idea of the right place to start, certain formulas are generally accepted.