This circuit, found in a 1958 magazine, is for reference only, since the components are not easy to find today. The transistors are germanium types and power supply is made by common cells.
This circuit was found in a Ferranti documentation from 1969. The transistors are common types of...
This amplifier is from the 80s integrated circuit manual itself. Equivalent configurations can be adopted for...
We found this circuit in an English magazine from 1980. The circuit can be easily assembled even...