The LDG AT-100Pro2 and AT-200pro2 are desktop tuners which cover all frequencies from 1.8 to 54 MHz, and will automatically match your antenna in no time. It features a two-position antenna switch, allowing you to switch instantly between two antennas. The AT-100Pro2 requires just 1 watt to operation (5 W for AT-200pro2), but will handle up to 125 watts, making it suitable for everything from QRP up to a typical 100 watt transceiver. The AT-200pro2 handles up to 200 W on HF, max. 100 W on 6m, minimum tuning power for the AT-200pro2 is 5W.
Each tuner includes over 2,000 memories for each antenna, automatically storing tuning configurations for each frequency and band as you use them. Frequency sensing circuitry lets the AT-100Pro2/AT-200pro2 "know" your operating band and frequency. Whenever you transmit on or near a frequency you've used before, the tuner can retune from memory almost instantly: Tuning time is 0.2 sec for memory tune, 0.5 to 6 seconds for full tune.
Rugged and easy-to-read LED bargraphs show power and SWR, and a Function key on the front panel allows you to access data like mode and status.
The tuners will match dipoles, verticals, inverted-Vs or virtually any coax-fed antenna. With an optional balun, you can also use longwires or antennas fed with ladder-line. Tunes 6 to 1000 Ω loads (16 to150 on 6m), 6 to 4000 Ω with optional 4.1-balun.
Control from the front panel is simple and straightforward; just press Tune while transmitting a carrier, and the tuner will begin an automatic tuning cycle. For even more comfortable operation control cables for Icom and Yaesu transceivers is offered as an option. With the cable, a single button-press transmits a carrier, executes a tuning cycle and returns the radio to its original power and mode.

Power requirements: 11 to 16 volts DC at 500 mA max., dimensions: AT-100pro2 19 x 14 x 5 cm. AT-200pro2: 24.7 x 18 x 5cm, Weight: 0,8 Kg. A DC power cable is included.