The Icom AH-4
is capable of matching to a 50 ohm feed line, antennas with impedance in the range of 10 to 5,000 ohms. The tuner is designed to operate with up to 120 watts of power.
AH-4阻抗匹配范围为:10-5000 ohms,功率120W;
很难想象我们多数商品电台机内天调阻抗匹配范围不过仅仅为16.7Ω to 150Ω!