1:1 voltage balun

4m Slim Jim Antenna - This 4m Slim Jim Antenna is cheap and easy to build yet it greatly out performs the more usual dipole due to its low angle of radiation. An SWR of 1:1 is obtainable across the 4m ham radio FM band with a simple adjustment.

Broadband Baluns - Voltage baluns and choke (or current) baluns.

Homemade HF Antenna Balun - AA5TB homemade balun article

Build your own HF balun - EA4EOZ home made baluns

Baluns in antenna systems - Understanding Baluns. This article explores some simple antenna system configurations and the effect of key system components, connections and dimensions on feed line common mode current.

QRP Magnetic longwire balun with VHF-splitter - This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.

Longwire Balun  ^updated - A long wire balun by ON6MU

Building a sextuple ratio balun - Article on homebrew a six separate impedance settings out of a triple radio balun

Ferite Balus 1.8 - 30 Mhz - 1:1 and 4:1 baluns diagrams

About Baluns - General article on Baluns at myantennas.com, what is a balun and when to use baluns

1 to 1 Current Balun - A 1:1 current balun by N5ESE

The 1:1 Current Balun - About 1 to 1 current balun by Roy Lewallen, W7EL

Balun 1:1 - 1:1 Ruthroff voltage balun using a T200-2 Toroid core

1:4 Current Balun - This project is intended to aid in tuning a balanced antenna or feedline that has a high impedance 100-600 ohms by N5ESE

BALUN 4:1 by IQ9BH - A detailed homebrewing project of a 4 to 1 balun in italian

A 4:1 Air-wound Balun - Homebrew a 4 to 1 air wound balun

Air Wound 4:1 Balun - Do you want to build a high grade, very useable 4:1 Balun for less than a fiver, if the answer is YES, then this project is for you.

80m / 40m Dipole - Build instructions for the 80-40 dipole antenna including Ugly Balun 40m trap and 80m Dipole

HF Blaster - The antenna is designed to cover 40M through to 10M meters, mounted on a fishing pole and a 4:1 balun by 2E0SDR

Changing Filament to Kenwood TL-922 - Mod to reduce filament voltage by using thinner and longer wires from filament transformer

Elecraft K2 Internal 4:1 balun - Adding an internal 4 to 1 balun to the K2

Amateur Radio Supplies - Ham radio dealer. Antennas, connectors, books, maps baluns and spare antenna components

A Precision Voltage Reference - A project by Don Wilhelm W3FPR

A NiCAD Battery Charger - A NiCAD Battery Charger with Current and Voltage Limiting

SWR calculator - Online VSWR Voltage Standing Wave Ratio Calculator