I've got kind of a weird problem. I built the cable to key from dxbase and it works fine on all bands except 40m. When I try and use it on 40, it keys down but never lets up and the rig stays in transmit mode until you hit a button to switch bands. The switch can be from 40 to 40, so long as you hit a button on the rig. It's very strange. Anyone seen this before? -bmb