EFHW Tuner

Posted on Feb 6, 2014

Martin KH6MB designed an antenna tuner for use with end-fed half-wave vertical antennas for use during annual feld day events. The tuner is capable of handling bands from 10-40 meters at legal limit power. The rotor shaft of the capacitor is attached to the 50 Ohm side to keep the high voltage away from your hand while tuning. Keep about 2 inches

EFHW Tuner
Click here to download the full size of the above Circuit.

spacing between the inductor and the capacitor. 2) Variable capacitor, 5. 5 83 pF, $45. 00, Palstar <> <>

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