impedance matching

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

Matching Coil Adjustment - There is a specific procedure which must be followed if proper adjustment of a shunt matching coil is to be achieved.

Twin Feed experiment - Experimenting a low impedance feedline by G3TXQ

SWR, Impedance and Line Loss - This article deals with the practical aspects of SWR, line loss and input impedance.

Coax Two Antenna Matching Network - 50 Ohm Coax Antenna Power Splitter and Matching Network

Coaxial Line Impedance Calculator  ^new - Online coax cable impedance calculator

NEQRP Noise Bridge - A noise bridge is a device for measuring or comparing impedances on coaxial cables, antennas, components, etc.

Antenna Scope - Do you want to measure antenna impedance at resonance? With this Antenna Scope, you have a simple RF Bridge for getting started in an exciting part of Ham Radio, building your own Antennas that work well

Digital HF Antenna Analyser Project - This antenna analyzer measures complex impedance over the 1.6 - 33 MHz HF spectrum by ZL2PD