Found in old documentation, this circuit uses an SCR like the TIC106 that must be equipped with a heat sink. The motor can be up to 3A.
We found this RF amplifier in documentation from the 1970s. Field effect transistors support...
From different input voltages V, it is possible to reduce the voltage to several fixed values...
This is a typical amplifier circuit for a commercial tape recorder from 1968. The circuit has an...