Found in a 90’s Popular Electronics, this circuit uses a component that can be difficult to obtain today. It achieves a 10 dB noise reduction with the indicated components.
This circuit was found in an old American documentation. Its purpose is a proportional scanning signal...
This circuit emits a loud sound in a headset when the driver who wears it nods while being in a...
This amplifier stage was found in a 1956 Sylvania manual and has an unusual configuration with a...