Of course, the original TO-3 regulators were linear and would generate a lot of heat. The Ton3y, as you’d expect from a switching power supply, runs cool (according to the scientific measurement ...
With careful design, though, a switching regulator can be constructed to almost completely replicate a linear regulator like this drop-in TO3 replacement. (Google Translate from German ...
These type of regulators thus are good to filter noise from an upstream supply. However, linear regulators are much less power-efficiency than switching regulators. Several Power Regulation Networks ...