We found this circuit in a 1965 Electronic Design. Transistors are still common but admit equivalents for some of them. The circuit drains a current of only 4 mA.
This circuit is from a 1967 RCA documentation. Components can be replaced with modern equivalents. The...
It can be obtained from Mouser Electronics new TPS54A20 Texas Instruments consisting of step-down...
In the figure we have a typical detector stage for a radio receiver. The circuit is from 1963,...