In the figure we have the configuration of series regulator protector suggested by Motorola in 1968 documentation. The transistors are of the time, being able to be used modern equivalents.
This receiver was found in an American documentation from the 60's. The circuit uses germanium...
We found this circuit in the Texas Instruments' Linear Circuits Applications. It uses an...
The values of R and C are set so that a time constant of the same order of magnitude as the...