14 Oct 2021

472kHz ATU

There is a common misconception that 472kHz ATUs have to be big. With low power this is not the case. With my 5W I have had no problems at all with a tapped ferrite rod as the photo shows.  With the outer of a coax this makes a very simple 472kHz station. The 50 ohm connection is very low down and the wire will be much further up the rod.

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