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4:1 Balun/Unun

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The MFJ-911 is a true 4:1 current balun/unun that transforms 200 ohm balanced and unbalanced loads to 50 Ohms. The response is amazingly flat from 160 to 10 meters because it is a true Transmission Line Transformer using 100 ohm characteristic impedance transmission line. Two low permeability ferrite cores are used to easily handle 300 Watts. You can change from balanced to unbalanced operation with the handy ground post. 2 x 4 x 1 inches.

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