Alternator Voltage Regulator (CB6375E)

This circuit was found in an Electronic World of 1968. The circuit uses power transistors of the time. The transistors are for 25 W of dissipation.

| Clique na imagem para ampliar |

Overvoltage protection (CB8360E)
Found in a 1960 General Electric documentation, this crowbar circuit blows the fuse in case of...
Crystal Tester (CB24174E)
This circuit was originally designed for testing crystals used in color televisions, but it works...
Test circuit with bridge (CB22530E)
This bridge-biased transistor test circuit measures gain in the range 0 to 300. Circuit is from...