This is a battery powered 3W power amplifier using germanium transistors. The circuit is from an English documentation from 1967. The transistors are from the time.
This circuit compares the input voltages by providing an output according to the curve next to the...
The integrator in the figure is characterized by low input current and is based on an LM101A. C1...
This circuit has a 100 dB dynamic We found it in a Popular Electronics from the 90s. Equivalent...