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Build a 160-10 Meter Guanella 1:4 balun
post 02 May 2025
Toroid & balun Links →
1:4 Guanella-Balun Current-Balun
The purpose of this article is to show how a 1:4 Guanella current balun changes an impedance level by a multiplier of four; for example, 50-ohm coax to a 200-ohm antenna
Constructing a 6:1 RF transformer
If it's using used a 50 Ohm coaxial transmission line, the main problem in constructing a 1:1 current balun using bifilar windings is that you have to get the impedance of the transmission line formed by the two parallel wires exactly correct
Balun & Chokes
I chose the LFB095051 ferrite tubes - sleeves with similar characteristics to the Mix31, therefore excellent for 80 and 160
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The purpose of this article is to show how a 1:4 Guanella current balun changes an impedance level by a multiplier of four; for example, 50-ohm coax to a 200-ohm antenna
If it's using used a 50 Ohm coaxial transmission line, the main problem in constructing a 1:1 current balun using bifilar windings is that you have to get the impedance of the transmission line formed by the two parallel wires exactly correct
I chose the LFB095051 ferrite tubes - sleeves with similar characteristics to the Mix31, therefore excellent for 80 and 160
Toroid & balun Links →
4:1 Current Balun using Ferrite rods
Guanella 4:1 Current Balun using Ferrite rods most articles on building the Guanella 4:1 Current balun use one or two toroids. For the range 1.8 MHz to 28 MHz
Zip Cord Transmission Lines and Baluns
A commercially available 4:1 voltage balun, was originally used for the transition between the 50 ohm coaxial cable and the balanced speaker wire transmission line
Calculating a choke balun
When the decision is made to put a balun type filter shoke choke balun, there is more to decide which coaxial cable to use; which diameter to give to the winding, and how many turns to put there
A Cost Effective Current-Mode 1:4 Balun
A cost effective current-mode 1:4 balun can be constructed from two lengths of coax, two ferrite rods
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Guanella 4:1 Current Balun using Ferrite rods most articles on building the Guanella 4:1 Current balun use one or two toroids. For the range 1.8 MHz to 28 MHz
A commercially available 4:1 voltage balun, was originally used for the transition between the 50 ohm coaxial cable and the balanced speaker wire transmission line
When the decision is made to put a balun type filter shoke choke balun, there is more to decide which coaxial cable to use; which diameter to give to the winding, and how many turns to put there
A cost effective current-mode 1:4 balun can be constructed from two lengths of coax, two ferrite rods
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