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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 27 Feb 2024
1:4 Guanella Balun Current Balun

Toroid & balun Links

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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


The K9AY loop antenna for 160 and 80m bands

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Satellite Antenna Rotator Controller and TRACker

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Duplexer 2m-70cm

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