Here are the steps I used. 1. I set my KX1 to use a hand key via menu InP => Hnd 2. I connect a hand key via a sub mini stereo plug to KX1. 3. I key TX via hand key. 4. Transmitter keys itself on and stays on until hand key is disconnected. The KX1 keyer works fine. Does this sound familiar to anyone? 73, Mike AB6CV