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.
Found in 1965 General Electric documentation this circuit applies to a LASCR used as an optical...
This circuit, which can be used as a shield, was found in Radio Electronics from the 90s. The...
This preamplifier is intended for the use with magnetic pick-ups. Power supply must have voltages...