The purpose of this circuit is to limit noise peaks on a radio receiver. The circuit is from an 80's documentation. The diode is commonly used and the circuit is applied to a receiver IF stage.
The CK722 transistor used in this circuit is one of the first commercial types in the world. The...
This automatic dimmer for incandescent lamps was found in a European publication from the 1980s. The...
This traditional doubler configuration with the 555 can be found in other articles on the author’s site....