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ANTHF - MFJ-911 4:1 Swichable Balun/UNUN The MFJ-911 is a 4:1 current balun/unun that transforms 200 ohm balanced and unbalanced loads to 50 ohms. The response is relatively flat from 160-10M. Two low permeability ferrite cores are used to easily handle 300 Watts. Balanced to unbalanced operation with handy ground post. 2½ x 4¾ x 1 inches. Perfect for portable POTA or SOTA operation using it for either a dipole or end fed antenna. Attach a 28 to 31ft. wire to it in the UNUN configuration an have 10-40 meter end fed antenna using a tuner. $35 shipped USA only. Listing #1739518 by WB7RBN Submitted on 08/12/25 Submitted from IP 38.77.172.81 Click to Contact Back to Previous Page

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