This circuit is from a Popular Electronics from the 90s, consisting of a repeater relay for remote control of TV, which today can be done by Wi-Fi or other simpler resources.
This circuit was found in an American 1980s documentation. Transistors can be commonly used for...
This regulator provides a regulated output voltage of 48 V under a current of up to 1 A from a 60...
The integrated circuit used in this filter is not very common today, but the configuration can be implemented...