I am wondering if I have to get the external relay box for running my Yaesu FT-450 into my Yaesu 2100B or will this Voltage match up ok? I know Ill have to make a new Cord for that setup as far as the relay (exciter) goes. Also is the ECT ALC an important thing to have hopoked up and what is the main reason for it? I know its setup on my FT-990 and 2100B now.