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When one operates at low power on SSB, speech processing becomes almost essential to get through the QRM. The circuit is a low cost speech processor that will perform well with a minimum of construction effort.

Two element X-Beam is a high-performance broad-band antenna that is ideal for Ham radio operators with limited space. X-Beams are inexpensive and easy to build. The performance of the simple X-beam is amazingly similar to larger, more conventional antennas by 4S7NR

Circuit and software to build a beacon keyer, includes downloadable packages.

An introduction to DIY building of a concrete base for a 45' mast.

Experimenting with the new way of building a radio receiver known as "software-defined radio". This page gives some information about this project.

Build a Low Power 4:1 Balun , by Charles Greene, W1CG with full-color, full-resolution graphics from the pages of QRP Homebrewer

N5IW ideas to build your own antenna in a restricted lot, or a stealth antenna. Includes PPT files of HF and VHF stealth antennas.

How to build a high gain vertical antenna for the UHF amateur or CB Bands, by radio experimenters handbook

An easy to build moxon antenna for portable use. A Moxon Rectangle is a two element beam, where both elements are folded towards eachother.

Several projects which will allow you to build your own RF design test equipment.

The document discusses a two-element parasitic Delta-Loop array for the 40 meters band, aimed at radio amateurs interested in antenna projects. It provides detailed plans and instructions for building a homemade Delta-Loop antenna.

A simple to build Yagi 2 element antenna for 15 or 20 meters band by 9m2mso

The best way to describe a go-box is a complete amateur radio station in a box. An example is described in this article. The project describes building a portable amateur (ham) radio station, known as a "go-box," housed in a durable orange Pelican case. The go-box contains all necessary radio equipment except for external power and antennae, which are carried separately. It includes items like a Yaesu transceiver, power supply, antenna tuner, speaker, and a clock. The case is designed for mobility and visibility, with a vertical layout to allow in-vehicle operation. Future upgrades might include cooling fans, an LED lamp, and built-in antennae for better functionality in various conditions.

Dedicated to building bridges between the EME, SETI and Radio Astronomy Amateur Interest Groups.

An Easy way to Monitor RF, AC or DC current with one instrument by W5JGV

A 5-band (20m-10m) HF antenna - Just 7ft square and great for a small garden. Build it yourself for around 60 GBP.

This article describe a small single wire antenna running on the side of the building allow operations on 80 meters band

2 Meter Halo Antenna project by Mike Fedler with many detailed pictues and detailes homebrewing instructions so you can build your own

This little antenna is cheap and easy to build, lightweight, and very functional on 2 meters and 70 centimeters by NA4IT

W5GVE article on homebrewing a 144 MHz DDRR antenna for mobile use

The 6 Band Inverted L Antenna MK3 is a versatile multiband antenna designed for amateur radio operators. This antenna covers 160m, 80m, 40m, 20m, 15m, and 10m bands, making it suitable for a wide range of HF communications. The design is based on a W3DZZ configuration, incorporating traps for optimal performance. The MK3 version features a sturdy 5/8th CB mast, replacing the original timber mast, which enhances durability against harsh weather conditions. The antenna's construction allows for effective operation, particularly on the 40m band, where it has been successfully used to contact distant locations including ZL, VK, and Antarctica. Constructing this antenna requires careful attention to detail, especially regarding the radials and grounding. The traps resonate at specific frequencies, and additional resources are available for building coaxial traps. The antenna is designed to work efficiently without an ATU on the lower bands, while higher bands may require tuning. This project is ideal for both beginner and intermediate operators looking to enhance their station with a reliable multiband antenna.

Pictures and circuit diagramm to build this power amplifier for 2 meters

This VHF 145 MHz antenna is easy to build and with no radials. It shows equal gain of 5/8 lambda. It is light weight, you can hang it somewhere (on a tree may be) and work.

A Compact size 80-10 m field day antenna offering a Low angle of radiation and very easy to build and set up

How to create a simple but effective half wave dipole, illustrated instrucions on how to build wire antennas

How to build a G5RV in italian

This page is a short description of the four phased verticals system i've build and used. It is primarily intendend to be used on the lower bands 160m, 80m, 40m.

How to extend your Wireless Network by building a 2.4 gHz wifi cantenna

The starting idea was to build a battery charger for Pb battery used in car and moto...

An easy to build antenna for ground reception of NOAA weather or amateur satellite signals. Double cross antenna by Gerald Martes

This isn’t a set of step-by-step instructions, but my info might give you some ideas for building your own antenna support.

How to build a ground plane antenna for the 40 meters band in french

An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band by K5GP

Easy home brew 2 meter copper jpole antenna build - under 20 bucks - Hits repeaters 45 miles away. Parts used bought at home depot build time 1 hour.

The page describes the construction of a simple omnidirectional, vertically-polarised dipole antenna for two metres using coaxial cable. It can be used indoors or outdoors, with no extravagant gain claims. The project is low-cost and can be completed in about 20 minutes.

A base station antenna you can easily build for 146,220 or 440 MHz, with performance similar to a J-pole but smaller and less obstrusive

How to build a multi-band dipole antenna with a single coax feed. Instructions for a 160M antenna that will fit in the space that a 75M dipole will with almost as good of results as a full size 160M dipole.

This page provides detailed instructions on building a Lindenblad antenna for 137MHz, including practical details, materials needed, and impedance matching. The author shares their own experience and tips for optimizing performance. The content is useful for amateur radio operators interested in constructing their own antenna for satellite communication on the 137MHz frequency.

Homebrew a 2 meter 1/4 wave vertical antenna for the 146 mHz ham radio band

This article by OK1FOU describes how to build a relatively small loop antenna which can be placed for instance at the balcony. It is especially suitable for a two band antenna covering two adjacent amateur radio bands (10/14 MHz, 14/18, etc.)

Build a 5 watt, 80 meter QRP CW Transceiver Designed by N1HFX

Don't buy or build a semi-vertical trap antenna until you read this article! If you can use a drill, saw and screwdriver this is a simple project.

Building coils for a portable dipole using a novel method of winding coils with weedeater cord! By K4MMG

Loop Antenna Starter Kit contains detailed plans for building the MTM Scientific, Inc. loop antenna from scratch.

In this designs G8ODE explains different methods to builds a choke balun

This doubet antenna is a half wave dipole antenna easy to build, in french

Presented here is a high-performance, circularly polarized omni-directional antenna that is easy to build, easy to tune, inexpensive, and will work all the mode J Low Earth Orbit (LEO) satellites

Build your own home made Antenna Analyzer with an arduino micro, or a cheeper one with a pic processor

Remote Control Antenna Switch made with two circuits board

An easy to build spectrum analyzer