4:1 matching balun

50MHz J-Pole Antenna  ^pop - Need a general purpose antenna on the magic band? The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarised antenna without the need for a ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.

Coax Balun - A very simple coax balun

IZ7ATH Projects  ^pop - Antennas, Keyer, amplifier, transverter, baluns

Baluns: theory and projects  ^pop - All about baluns with photos, projects and instructions, by IZ7ATH

GW0VMR construction ideas  ^pop - selection of construction ideas from Patrick, GW0VMR, includes ATU, Baluns theory

Magnetic Longwire Baluns  ^pop - Do these things do exactly what they say they do, or are they total hogwash? - Patrick lifts the lid on the MLB

DIY Basic Electronics and Antennas - DIY Basic Electronic Theory, Basic Antenna Theory with Antennas built from common materials. What does SWR really mean. Baluns from transmission line.

LU9DPD Daniel - Homebrew, antenas, balunes, expediciones, circuitos, electrónica, torres, fotos y relatos, todo referente a radioafición, radioaficionados y radioamateur

How To Make A Homebrew 4:1 Balun  ^pop - I built a homebrew 75 meter Double Extended Zepp Antenna, And I needed a 4:1 Balun So I decided to Homebrew the Balun also. Here is how I did it!

Choke Balun Designs - In this designs G8ODE explains different methods to builds a choke balun

Using Delta Matching on HF Beams - Using delta match with HF antennas design

J-Pole theory  ^pop - The J-Pole antenna is an omnidirectional antenna that can be used for base, mobile and field day stations. It does not need a ground plane, radials or a complicated matching system. The J-Pole can be cheaply, simply and quickly constructed using a variety of techniques, some of which are discussed in this article.

Broadband receiving antenna matching - This article addresses the subject of obtaining the best signal transfer from an antenna to the typical 50-ohm receiver input over a wide frequency range, with emphasis on medium-wave (500 – 2000 kHz), encompassing the standard AM broadcast band and the 160-m amateur band.

Inductors used in antenna matching networks - Article about variometers, helipot inductors, roller inductors, binary switched inductors, Coil and Capstan by G3YNH

OH7SV Matti Hohtola Ham Projects  ^pop - The most modern QRP transceiver in 2004,Direct Conversion HF Transceiver with DDS LO, 50 ohm to 200 ohm HF wide band transformers, Wilkinson splitter for RX measurements, Windom baluns 2001/2004, Ferrite rod antenna for 80 meter, Magnetic Loop Antenna for 80 m, Mascot Switched PSU 9320 modification to 8A peak current, 150W MOSFET linear amplifier for 80m, 80 m HF SSB/CW Transceiver

The WireMan - Your source for coax, connectors, wire, baluns, and other certified quality wireman products.

Radioworks - Source for high performance wire antennas, Current-type Baluns, Line Isolators, quality wire antenna parts and accessories.

Antennas & More  ^pop - Radio Amateur Antennas, Solar power, Antennas West products, Ham Radio gear, G5RV, Windom, Baluns, Wire, and Coax

Centaur Electronics, Inc. - Baluns for amateur and commercial radio.

Palomar Engineers - RFI Kit, ferrite cores, baluns, loop antennas, antenna tuners and various accessories

Palstar - Receivers, Antenna Tuners and accessories, antenna analyzers, dummy loads, wattmeters, shortwave radio receivers, baluns, filters

Balun Designs LLC - Balun Designs wind high quality baluns and ununs for Amateur Radio and commercial applications based on the researched and tested designs of Dr. Jerry Sevick, W2FMI.

International Technology Antennas - Yagi monobanders, multibanders, dipole, verticals, balun, MTFT.

Andrews Communications Systems - Australian dealer, HF linear amplifiers, power supplies, baluns, HF UHF yagis and verticals including multiband HF verticals.

K1TTT Technical Reference Priority listing - Technical reference about Accessories, Amplifiers, Antennas, Cable and Connectors, Filters, Geography, Grounding, Gunk, Matching Networks, Projects, Propagation Info Radios, RFI/EMI, Rotors, Station Setup, Towers.