This amplifier with antique germanium transistors is from a 1968 publication. The circuit provides some watts of power with excellent sound quality. This is the configuration used in commercial equipment of the time.
The components of this circuit are from the time of its publication in the 1980s. Modern...
In the figure we have the way to obtain a voltage indicator for a 3-terminal voltage regulator. The...
We found this circuit in a 1972 documentation. However, it can be assembled with more modern...