The circuit is from 80s Siliconix documentation. The integrated circuit is from the company and is not common today. It can be used operational equivalent more common in our times.
This analog TV circuit can be used on a small transmitter. The circuit is from an 80's American...
This filter rejects 1 kHz signals, being suggested by the manufacturer of the operational...
This circuit was obtained from an American publication from the 80's. We can use a BD136 instead...