This timer was found in English documentation from the 80's. The integrated circuit is common nowadays and the MOSFET admits equivalent according to the controlled load.
To a 16-0hm load, this amplifier provides a power of 10 W. We found this circuit in a Motorola...
This distortion circuit was found in an American publication from 1970. It can be assembled with...
This configuration was found in an English magazine from 1965. It is valid for any junction FET. The...