[Reece]

I believe the knobs on those radios are "captive" so people can't pull them off and touch the "hot" shafts. I think you pull the chassis screws underneath and then pull the chassis out, the knobs staying in the panel. I've got a K731 in the colonial cabinet that I got for FIVE bucks at an estate sale, still works but needs recapped and refinished and I haven't got to it yet but recall reading about those knobs. The underchassis screws aren't hot because they screw into plastic blocks anchored to the chassis. The chassis isn't technically directly hot but has an interference-reducing cap from line to chassis so you could get a tickle out of it and a bit more if the cap was shorted.