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.
L1 and C1 determine the frequency of this Colpitts Oscillator. Refer to our section Mathematics...
This circuit was found in a 1969 EEE. It detects when there is a phase failure in a circuit using...
This circuit was found in a Hands On Electronics with the suggested application an optical link for...