Yes, this is the style of foot controller. I love mine because it DOESN'T get warm! No matter how long I use it, my foot doesn't get fried. And, I agree with Joe, the right position is immediate. So handy!
I wonder if the resistance in the components is greater when they are aged through use? My Ambassador looks practically new. It was kept in its box, sealed, for decades. The cord is not twisted and is still like-new flexible. Grant? Joe?