DIX188. I have never heard any reason one would want to have the HF in an OFF position during takeoff and especially if you plan to use it during the flight. Enlighten me on this procedure, if it is in fact a common practice, call me clueless. I've only been doing this for 45 years now and I can recall Constellations with Radio Operator stations. Just pulling your leg a little but I'm sure even old dogs can still learn something.