This stereo circuit is from Japanese 1960 documentation. The circuit was originally designed to work with a tube amplifier, removing power from it. The transistors are germanium.
This amplifier for small cassette tape players was found in an English documentation from 1969. The...
The circuit is from an 80's publication, but the components are current, only special type diodes...
This circuit is a continuation of the previous one, serving as a protector against overloads in...