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.
Synchronized key. This circuit was found in a 1966 General Electric documentation. Modern...
This oscillator by Wien bridge is based on stabilization by a small incandescent lamp. The...
This oscillator with the PLL 4046B was obtained from a 90s Radio Electronics. The circuit...