balum 1:1

10 meter wonderbar antenna - 10 Meter WonderBar Antenna, present an SWR 1:1 over entire band, great DX, rotateable by hand, 8 ft long - build for about $20

5el 28MHz OWA Yagi Priority listing - 28-29MHz with an SWR less than 1:1.1 and good performance

A 6 element OWA Yagi for 28MHz Priority listing - This is a high-gain, wideband OWA Optimised Wideband Array Yagi which covers the 10m band with an SWR of less than1.1:1 from 28-28.900MHz.

3element 24MHz LFA Yagi Priority listing - Computer optimised with the very latest Particle Swarm Optimisation techniques. A stunning perfoming 3el with SWR not above 1.1:1

7elements 21MHz OWA Yagi - An Excellent 15M compact 7el OWA Yagi for the 21MHz band. SWR remains below 1.1:1 from 21-21.45MHz. Tapered elements in Metric and USA sizes

The Ugly Balun - A 1:1 choke balun for 160 thru 10 meters using one continuos lenght of coax to rig.

Magnetic longwire balun - Magnetic longwire baluns 1:9 combined with ground, a 1:2 and 1:1 balun connections by ON6MU

Switchable Balun - A 1:1 to 4:1 switchable balun by N1LO

A 1:1 Coaxial Balun  ^pop - PDF article on a coaxial 1:1 balun by I0QM

A Cost Effective Current-mode 1:1 Balun - A cost effective current-mode 1:1 balun can be constructed from a length of coax and a rod typically used for a broadcast antenna loop-stick, some electrical tape, cable ties, a length of PVC water-pipe and some connectors.

Low cost 1:1 balun - A balun don't depend on use of ferrite beads, but use steel wool to attenuate any RF on the outer braid

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.

Practical Guanella 1:1 balun - This article proposes a lossy transmission line model of a practical Guanella 1:1 balun that is effective for all frequencies within and immediately adjacent to the pass band

Guanella 1:1 VHF choke balun - A model of a Guanella 1:1 VHF choke balun using a FT140-61 core

N5ESE's 1:1 Current Balun - classic 1:1 current balun

Air Cored 1:1 HF BALUN - An air cored 1:1 balun for 3.5 to 30.0 MHz

Balun for HF wire dipoles - a neat 1:1 50 ohm balun for use on HF horizontal wire dipoles.

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

A model of the W2DU 1:1 choke balun - Notes on making the W2DU choke balun by placing several ferrite sleeves around a coaxial cable.

RF choke or 1:1 balun - RF Choke to prevent hf currents on the feedline or...1:1 Choke Balun, sometimes called the "UGLY BALUN"

Winding an Effective 1:1 Coax Balun - Guidelines to wound a balun by WA2SRQ

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.

TET-Emtron - Australian antenna manufacturer specialise in supplying amateurs with the best quality products. Amateur radio multiband Yagi antennas, balums, cb antennas, dipoles

K4TR Antennas - K4TR Manufacture and sell simple dipoles, half square 2 wire phased vertical arrays, end fed zepp antennas, G5RV antennas. 1:1 baluns

QRP 1:1 Current-type Balun for Portable Use - A ferrite-loaded coaxial RF choke which just happens to yield the same result as a 1:1 current balun