Found in an American publication from 1968, this circuit can be made based on a TIP42 that must be mounted on a heat sink. The transformer is 25 V with a current of 3 to 4 A.
This circuit was found in an ancient American documentation. The transformer is the type used in...
This low-pass circuit was found in the December 1990 issue of Radio Electronics magazine. The...
Published in an old Popular Electronics, this circuit makes use of components that are still...