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 for vocal effects in the September 1990 issue of Radio Electronics magazine. The...
The original design of this circuit is from a 1978 publication. The circuit can be implemented with a...
We find this circuit in a 1980s documentation. The integrated circuit used is unusual today. The...