This interesting circuit for analog TV selects the first line of a frame. The circuit was found in a 1967 Electronic Design. A modern equivalent transistor can be tried.
This inverter is critical for transformers and can use modern equivalent transistors like MJ2955 on...
This circuit came out in an English publication of 1976, but it can be easily assembled using...
This circuit was found in old documentation. Transistors can be general purpose JFET types and the...