I found tis circuit in na old documentation from 1958. The circuit uses germanium transistor availble that time and hard to obtain today. The circuit is indicated for phono applications using variable reluctance transducer.
Found in a RCA publication from the 1970s, this circuit is intended for the production of pulse...
In this application, from English documentation, we have the way to activate an AC load up to 10 W...
This circuit consists of a control panel for motorcycles and cars monitoring various functions such as...