I've run the RT-100/RC-100 pair for about 3 years now. Antenna is 31' Vertical and 4:1 UNUN & tuner at base. It tunes 1.8:1 or better on all bands 160m-6m. It tunes fine with my QMX's and IC-7610. Living in Michigan, I keep it wrapped with black garbage bag and leave powered continuously. It did quit once at -10F but restarted when temp went up. I wish there were a way to clear memories and retune.?