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 is the transmitter for the previous circuit. We found it in a 90s Electronics Now. The...
This configuration is also valid for other operators and the formula for calculating the gain is...
One of the most traditional voltage regulator circuits, quite old, but still in frequent use even...