Voltage Regulators

............Well and the thing is what you "think you might be buyin" are probably NOT mechanical at all. Just about any I've seen in parts stores for replacement are ACTUALLY solid state units.

How to tell? EASY. Look at the bottom. Actual "mechanical" VR has two great big wirewound resistors......like this



While the electronic look-alike always has a "clean" bottom sometimes with a PC board

like this....