Hello. I'm a bit of a newbie here and thought I would share some information, as well as see if anyone else ran into this. I bought a second Midland MXT400 to serve as a base station. Instead of hooking up to a 12V battery, I wanted to plug into an AC to DC converter. I bought one that I thought would work. However, the MXT400 gave a "LO DC" error on transmit at full power. I began to think there was a problem with the radio. However, if I lowered the radio to Mid or Lo for transmit, it worked ok. I also then hooked it up to the truck battery directly and its did not have this response at full power transmit. So, I did some research and Midland said this radio needs at least a 10 AMP AC to DC converter (mine was a 6 AMP constant, 8 AMP surge). I've ordered a 10 AMP constant, 12 AMP surge) and will update the outcome here. https://midlandusa.com/convert-micromobile-base-station/ Scott