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.
We found this circuit in a 1975 publication. The power supply must be symmetrical, but other...
This circuit was obtained in an old Linear Technology documentation by applying to the monitoring of...
The keyboard for this organ is made by small metal plates where the probe touches when in...