We found this circuit in the 1983 edition of the Electronics Experimenter handbook. The circuit uses components that are common today, although many admit equivalents.
Originally this circuit is from an English magazine, but I found it in Argentina's Radio Chassis...
This circuit was obtained in a 1967’s EEE. Transistors and integrated circuits can be replaced by...
In the figure we have a simple amplifier stage for BC547 series transistors. The gain is...