1:1 Feedline Isolation / Choke Balun

This QRP balun is wound with mil spec teflon insulated coax which provides a consistant 50 impedance for the windings. The design provides high levels of feedline isolation, RF choking and excellent return loss for those who want top...

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...

Designed for those who want the maximum isolation and choking across the full HF spectrum. Building on the original 1:1 design by Dr. Jerry Sevick, this balun has two (2) cores in a stacked configuration to maximize choking impedance on HF bands from 1-...

We have updated and modified the design of this unit to allow the use of a common UHF "tee" on the output for the dual feed of the MA5B yagi.  This allow us to build for a lower cost and reduced time which we can pass along to the buyer. ...

This Isolation balun is an identical design to the Model 1115d with one key exception. The 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...