This circuit was found in a 1968 Hughes documentation. The transistors are from that time. The coil is for the medium or short-wave range.
This circuit causes the relay to be energized when the input voltage exceeds the voltage value of...
The circuit we present is suggested by Linear Technologies (www.linear.com) and makes use of an...
Found in American documentation from the 90s, this circuit can be used as a shield with the...