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 circuit is intended to measure the Idss current of a junction FET under test. The limiting...
This circuit was obtained in an old documentation, but it can be easily implemented with BC548 and...
This circuit was found in a Hands-On Elctronics from 1987. The field effect transistor admits...