This simple 12 V power supply with current up to 2 A was found in a Popular Electronics from the 90s. The zener diode is 14 V and transistor Q2 can be a TIP42.
This circuit couples 600-ohm signals to a line of the same impedance consisting of an amplifier stage....
This circuit is suggested by RCA and is based on a dedicated integrated circuit that is the...
The power supply shown has protection against short circuits and can eventually be mounted with...