Found in Motorola documentation from the 1970s, the circuit presented uses a component from the era that is not common today. The characteristics of the coils are given next to the diagram.
The integrated circuits used in this project are double equivalents of the well-known 555. The...
This unit is intended for powering low consumption devices. The operating frequency is...
These three circuits have different treble responses. We found them in the February 1970 issue of...