Thanks a million Kurt but it is the inside of that little black switch assembly that has me baffeled. There is a little tiny coiled spring that flips an arm over to make power connection. It (the little black box)cannot be taken apart without fileing off a couple of simi-tubular rivets and then things fly apart on there own befor you can see how they are put together. The 36 head does not switch in the head but the switch is in the radio box, a big improvement.