Icom AH-4

 Icom AH-4 ATU   - use with most models

100W HF Automatic Antenna Tuner can be used with the IC-706MKIIG, IC-7400, IC-756 and IC-756PROII

The Icom AH-4 is a wide-range antenna tuner capable of matching a 50 ohm feed line to an antenna feed impedance in the range of 10 to 5,000 ohms. The tuner is designed to operate with up to 120 watts of power. It incorporates 22 relays that switch combinations of inductance and capacitance to achieve tuning - typically within 1 to 3 seconds.