This circuit is from Delco Radio found in a 1968’s documentation. The transistors are of the time and are not given information about the driver transformer. Note the high supply voltage.
This simple circuit that activates a relay was found in Radio Electronics magazine in May 1966. The...
Found in 1990s documentation, this circuit tests both PNP and NPN transistors by providing status...
This is a traditional configuration of a transistor amplifier with complementary transistors that can be...