I have a 50s-era GM Frigidaire electric stove+oven and there's no PWM anywhere. It's simply multiple choice knobs for predefined temperature settings selecting

I have a 50s-era GM Frigidaire electric stove+oven and there's no PWM anywhere. It's simply multiple choice knobs for predefined temperature settings selecting how much current to continuously flow through the heating elements. It's by far the best electric stove I've ever used, I love it and dread the day all knobs have let the 240VAC smoke out.