The AT-11 is a full featured auto or semi automatic antenna tuner designed for HF (1.8 to 30 MHz) transceivers using 5 to 150 watts. The tuner uses a switched "L" configuration with 256 capacitor, 256 inductor and Hi/Lo-Z settings to provide over one hundred and thirty thousand tuning combinations. The "L" network works great with just about any coax fed antenna (dipole, vertical, beam, etc). Users with long wires can install a balun between the tuner and the antenna. Tuning time is between 0.1 and 5.0 seconds with the average being about 2.5 seconds.