Balun Designs

Balun Designs, in collaboration with Fair Rite products, has developed what we consider to be the best single core 1:1 feedline isolation balun available and designed for space constrained...

This Isolation balun is identical in design to the Model 1115d but with one key exception. The toroid material utilized for the two stacked cores is optimized for the lower HF bands and provides...

Our "i" series of feedline isolation baluns provide excellent feedline decoupling and, depending on the model selected, low loss performance across the full HF spectrum. The model...

This Isolation balun is identical in design to our 1116d choke balun but with the two SO-239 connectors on one side to provide easier connectivity in tight spaces. The toroid material utilized for...

After numerous requests, Balun Designs is pleased to offer a specialized 1:1 balun optimized for 6 meters.   The material for this core is optimized for 50-54 MHz and provides exceptional...

This is a unique 1:1 transmission line transformer intended to provide highest possible isolation between input and output.  Consequently there is no direct electrical connection...

This is a departure from the normal 1:1 isolation/choke balun and utilizes a bifilar pair designed to handle the high voltages created by multiband antennas such as doublets and multiband loops ...

This is a departure from the normal 1:1 isolation/choke balun and utilizes a bifilar pair designed to maximize inter winding breakdown voltage found on multiband antennas such as doublets and...

This is a departure from the normal 1:1 isolation/choke balun and utilizes a bifilar pair designed to handle the high voltages typically found on multiband antennas such as doublets and multiband...

This is a unique design by Dr. Jerry Sevick (W2FMI) that combines a 25 ohm balun with a 1:2 unun for final transformation to 50 ohm unbalanced transmission line. Used anywhere there is a...

22/25 ohms unbalanced to 50 Ohms unbalanced Unlike Baluns, Unun's (unbalanced to unbalanced) provide impedance transformation for antennas that are naturally unbalanced because of their...

12.5 Ohms unbalanced to 50 Ohms unbalanced This unbalanced design is excellent for matching antennas such as inverted L's, short vertical wires and other low feedpoint impedance designs...