This circuit can generate signals up to 100 kHz. Found in documentation from the 1980s, it makes use of operatives of the time.
We found this circuit in a 1965 publication by General Electric. The zener is 8.2 V x 1 W and the...
This circuit was found in a 1994 documentation. The transistors can be BC558 and BC548 and the...
This amplifier stage, obtained in a 1980 publication, has a low input impedance and a high output...