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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
post 01 Jan 2026
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A Simple Clamp-On Current Transformer
After the core was cut I wrapped a layer of electrical tape around the core as shown in figure 3. The next step was to cut a strip of copper
Homemade ferrite core baluns
I became interested in baluns when I had to choose one for my OCFD antenna. Generally 1:6 baluns are recommended for OCFD's as the nominal impedance at the 1/3-2/3 feed point is about 300 ohms
Balun sur air
It's a question of doing as well as a manufactured product and getting an education the equipment is reduced to a dummy load of 50ohms and the analyzer MFJ-259
Construction de Baluns
The transformer uses two ferrite tubes, material "43" or "61", or other material with permeability between 125 and 850.
End-fed wire antennas with 9.1 balun
The balun trasnsform the very high impedance at the end of a half-wave wire to about 50 Ω
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After the core was cut I wrapped a layer of electrical tape around the core as shown in figure 3. The next step was to cut a strip of copper
I became interested in baluns when I had to choose one for my OCFD antenna. Generally 1:6 baluns are recommended for OCFD's as the nominal impedance at the 1/3-2/3 feed point is about 300 ohms
It's a question of doing as well as a manufactured product and getting an education the equipment is reduced to a dummy load of 50ohms and the analyzer MFJ-259
The transformer uses two ferrite tubes, material "43" or "61", or other material with permeability between 125 and 850.
The balun trasnsform the very high impedance at the end of a half-wave wire to about 50 Ω
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