This is a simple tubed mixer from the 50's. The circuit does not include the power supply and has 3 inputs with independent controls. The tubes are double and the inputs are high impedance.
May 2017 - Microchip LAN8710A and LAN8710Ai integrated circuits, low-power, high-performance...
This circuit produces sequential outputs for the activation of several appliances in a residence, thus...
This circuit is from an old documentation. Integrated circuit 723 is not common today. The power...