simple 4:1 balun

Shortened vertical antenna for 7 Mhz - A simple drawing of a shortened antenna for 40 meters by using a PVC tube

Coaxial cable dipole for 80m - Here are some simple antennas you can build along with calculators to help you get the right length.

Axial-Mode Helical Antenna Calculator - Simple implementation of the ARRL Antenna Book design equations for the axial-mode helical antenna.

A Simple 7 element Yagi calculator  ^{updated  pop} - A JavaScript to calculate the dimensions for a seven element Yagi-Uda Antenna

W4HN Antenna Calculator - Calculate your dipole, 3 element yagi and a simple dipole

Antenna wire catenary calculator - This is a simple calculator for solving the antenna wire catenary between to end points given the design wind speed, mass per unit length of the wire, wire diameter and Gross Breaking Strength of the wire.

Another Ugly Choke Balun - A home made balun build using a short length of 4 inch drain pipe and 18 foot of RG58 by G4APL

OH7SV Windom baluns - Windom baluns for kilowatt range made with two ferrite toroidal cores amidon ft-140-61 and another schema with two ferrite rods

Balun Construction - Construction and use of broadband transformers

Simple HF Baluns for 50/75 ohm coax - Show diagrams, winding methods and tables of some 1:1 and 4:1 baluns for 1.8 - 30 MHz suitable for use up to 200W (400W peak) on systems using 50 or 75 ohm coaxial cable input where SWR should not exceed 1.6:1.

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

A 4:1 Balun  ^pop - A single-core 4:1 current balun of improved performance by Chris Trask N7ZWY PDF file

A simple EH antenna - Simple EH antenna project for EH antennas from 20 to 10 meters band by F5IXU in french

W3HH Multiband antenna - A french pdf file that explain how to build a T2FD antenna in all its parts including balun

Build a Tuned Loop - How can you vastly improve your Medium Wave reception? its quite simple really, all you need is 120 foot of wire, a few lengths of timber and an old tuning capacitor with which you can build the answer to every DX'ers prayers, a tuned loop antenna.

Simple VHF Gamma Match - Plan of a simple VHF & UHF Gamma match contrstruction

ZL1BPU Rotator Controller - A very simple controller circuit, with fairly smart performance! The ZL1BPU Rotator Controller has been designed as an add-on unit for the popular Kenpro KR-400 and Yaesu G-400 rotators. The controller consists of a small circuit board which fits inside the rotator control box (see picture).

10 m Aerial Matching Unit - This simple matching unit will allow a 10 meters aerial to be used right across the 10m band without the need to physically adjust the elements, and offers a virtual 1:1 VSWR at 50 ohms impedance to the transmitter.

A stealth HF antenna - A wire antenna matched with a 4:1 balun that can operate with the help of a tuner on all hf bands. By IW2EVK in italian

Radio QTH practice exams - Call sign lookup system based on FCC database allow lookup for vanity call signs, practice exams and simple online qsl card creation

E-Z Tube aluminum - E-Z Tube aluminum tube is a versatile, light duty construction system that offers a cost effective and simple method of constructing aluminum tube frames.

Shortwave Converter - This is a simple circuit that when placed near an ordinary AM broadcast radio will allow you to receive international shortwave broadcasts in the 5-6 MHz band

RoMac PSK31 - RoMac PSK 31 windows commercial software, is a simple to operate, yet has many robust features to make operating PSK31 a very enjoyable experience. Operates PSK31, PSK63, QPSK31, and QPSK63.

Tutorial on ferrite balun cores - Toroid cores, ferrite rods a good electrical tutorial on baluns

A simple SWR Meter - This article describes a simple QRP SWR meter built using readily available parts.