This is the power supply circuit for the amplifier in the previous circuit. The source is adjustable and uses power transistors of the time. The AC transistor must be mounted on a heat sink.
This circuit was found in a 1987 edition of the United States' Hands-On Electronics magazine. The...
This circuit was found in a 1977 American manual. The integrated circuit is from the time....
Found in a Popular Electronics from the 90s, this circuit generates a signal that depends on the...