Yagis / Beams

We're bring back one of Dr. Jerry Sevick's (W2FMI) original designs but with upgraded windings.  This balun was one of our original workhorses and now with new coaxial windings, provides a single core balun optimized for 40 - 10m.  By using our...

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 today. By reviewing the scans shown below you can see what we're referring to.  Notice how the...

Building on the original 1:1 design by Dr. Jerry Sevick, this balun has two (2) low permeability cores in a stacked configuration to maximize choking impedance on HF bands from 7- 54MHz. By utilizing Mil-Spec coax, the SWR, transformation and power...

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 exceptional choking impedance at these frequencies. In...

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 choking impedance at these frequencies.  An...

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 need to transform 25 ohms balanced to 50 ohms unbalanced...

This is a balun originally designed by Guanella and subsequently improved by Dr. Jerry Sevick (W2FMI sk). By utilizing Thermaleze wire inserted in Teflon tubes, Dr. Sevick was able to substantially increase the breakdown voltage between both conductors...