Very useful product for rigs with built-in tuner. Most recent transceiver do have a built-in tuner, but those offer only a limited impedance range. This is where the MFJ-914 comes in. With the use of this tuner extender the impedance matching range is increased 10-fold, allowing to match nearly any antenna. No more problems due to component failures of the internal tuner. The "Off" Switch switches the antenna to ground and the transceiver to the external (optional) dummy load. Works on shortwave from 160 to 10m, max. 300W.
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