1:1 voltage balun

VSWR Loss Calculator - This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR (voltage standing wave ratio) and other subsequent factors

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

Some Aspects of the Balun Problem - Why all the mystery surrounding baluns ? To use or not to use baluns

Design & Performance of a Choke Balun - Design & Performance of a Choke Balun and Balanced Transmission Line by G4FGQ

1:6 Balun for HF - PD2HFE project of a 1:6 Balun for HF Bands using a T-200 toroid core

Magnetic longwire baluns 1:9 - 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.

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

4:1 balun project - CVARC 4:1 Balun Project Kit by AE6YC

4:1 coax balun design - Online calculator for a 4 to 1 coax cable balun

Guanella 4:1 balun - This article reviews the proposition that a 4:1 current balun in the style of Guanella can be constructed with both pairs of windings sharing a common magnetic circuit.

Homebew RF chocke - RF Choke to prevent hf currents on the feedline

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"

Home-brew Antennas - Notes on homebrewing antennas by Chris G4CYA, from gamma matching, to phasing antennas, splitters and combiners, baluns and measuring techniques.

Antenna maintenance by PA0FRI - PA0FRI article on maintenance or a FRITZEL antenna by cleaning and restoring antenna traps, baluns and elements

Basics of antennas - The current, the voltage, the impedance, the bandwidth, the polarization, and how the earth influences the famous radiation pattern.

Communication Coil - Communication Coil, Inc. designs and produces custom, high reliability Filter Networks, RF Coils, Chokes, Inductors, Baluns, Toroids and Power Magnetics for communications

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

Chushcraft A3S - Simple Balun Support - A method for supporting a balun on a Chushcraft A3S antenna. This allows the balun to be isolated from the boom, thus reducing the effect of introduction of reaction with the balun core.

WinPic 2007 - Program bulk erases, reads, writes and verifies PIC10F, PIC12F and PIC18F families. PIC part number selection. Programmnig voltage selection. 2V to 5V/ 0.25V step. Firmware updating.

Increasing Amplifier Relay Speed - Article describes a circuit that accelerates the coil of DC relays by momentarily doubling their voltage.

Simple beacon construction notes - Here is a simple, self-contained beacon which can run a few milliwatts or as much as a watt depending on choice of amplifier and supply voltage.

Universal frequency counter & voltage meter - to be used with QRP transceivers

6L6 Transmitter - 40 meters band 5 watts transmitter, uses a 6L6 with a 6X5 rectifier and a 0D3 voltage regulator tube on the screen.

A Ham's Guide to RFI, Ferrites, Baluns, and Audio Interfacing - Understanding and solving RF interference problems using ferrite

Home-Brew Regenerative Receiver - Home-Brew Regenerative Receiver and experiments with low voltage operation.