Remember the good old days before the CK722? Remember when your table model AM radio cast a warm, friendly glow on the wall from the filaments of its vacuum tubes? Remember the comforting warmth of the radio's cabinet? Remember how that thing had the capability of killing you?
It's hard for some younger folks to believe, but these things could be lethal if you happened to come into simultaneous contact with such a radio's chassis, or in some cases the chassis mounting screws or control knob shafts and the nearest radiator.
There were television sets made this way too and they were just as dangerous, especially the AC-DC televisions that used metal cases.
If you ever happen to come across one of these oldies, BE CAREFUL. As Captain Kirk said to Ensign Chekov in one episode, "At close range, these things can be as deadly as a phaser."