Note
The MFJ-1644 is a 200 watt, 80–10 meter antenna tuner designed for tuning short whips as well as virtually any random length wire antenna. It is designed for either fixed station or portable use, and, with its built-in artificial ground tuning system, will match any transmitter or transceiver to virtually any antenna.
The tuner section uses a reversible "L" network. The advantage of the “L” network is that it has only two tuning controls, and only one tuning solution for given impedance match. There is a rear panel connector for coaxial input and a “Hi-Z/Lo-Z” switch for reversing the “L” network. An internal input-isolating current balun provides isolation of DC and RF grounds for optimum tuning of the RF counterpoise.
An RF Current Meter indicates the summed antenna and counterpoise antenna currents, making tuning particularly easy. Simply tune for maximum RF current.
