MFJ Enterprises Original MFJ-913 Balun 4:1 Current 300 Watts

(1238 Reviews)

Price
$65.00

Quantity
(10000 available )

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38 Ratings
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Reviews
  • Yuri Botnar

    > 3 day

    Simple device, works great, with a manual control antenna tuner I am able to get SWR in a range from 80 to 17 m with a 40 m wire dipole antenna in the attic.

  • Ed G

    > 3 day

    product as expected. appears to be good quality.

  • Hester Swaniawski III

    Greater than one week

    MFJ is good quality.Worked good on ocf antenna.

  • IT Guru

    > 3 day

    Yes its not 1kw but for a 100w radio it works perfectly fine and being so lightweight it didnt drag my OCF down since i have no way to support from the feed point, only pulled tight from the ends. So for my needs it was perfect.

  • MattS

    > 3 day

    This MFJ-913 works great on my 80,40,20 OCF but only up to 40 meters. The swr is great at 80 and 40, just a touch of tuning is needed at 20. But now my feed line is radiating on 80 meters after only a week of having it up and is causing rfi in the house. Im only running up to 100 watts. Probably just a quality issue im guessing.

  • HD-RIDER

    > 3 day

    This will be used on a future antenna build.

  • Glenn

    > 3 day

    It appears to work OK, and I did not have to return it for repair, if you know what I mean..

  • c333horne

    > 3 day

    Great product and service

  • TCB

    > 3 day

    A very good 4:1 balun to match my 300 ohm balanced line feed.

  • acwiz

    12-06-2025

    As advertised.

The MFJ-913 is a 300 Watt true current baluns/antenna center insulators that transforms 200 ohms to 50 ohms. Transmission Line Transformer construction using 100 ohm characteristic impedance transmission line gives flat 160-10 Meter response. Large low permeability ferrite cores easily handle full power. SO-239, stainless steel hardware with direct 14 gauge stranded copper wire connection to antenna. Heavy duty weather housing. Measures 4¼ x 2 inch diameter.

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