Suggested by an American publication of 1964 this circuit is intended for the capture of signals from film tracks recorded by optical systems, common at the time.
This decoder filter was found in a 1975 documentation. The integrated circuits can be 741. The...
This circuit for medium and short-wave ranges, according to the transistor used, was obtained in...
Linear Technology (www.linear.com) has in its component line the LT3518, recently launched, which...