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.
This circuit can use any general purpose NPN transistor and the accuracy depends on the tolerance of...
This circuit was obtained in a 1981 documentation. The warning system for this circuit consists of an...
This FM transmitter was found in a 1997 magazine but can still be easily assembled. 18-wire in the...