We found this circuit in documentation from the 1980s. The transformer is of the low voltage type with a 1: 3 turn ratio and the transistors can be of general-purpose types.
This circuit was found in a Hands On Electronics with the suggested application an optical link for...
This circuit is from an Electronics World of 1967. The circuit slows down the activation of a...
This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of...