This circuit is used in magnetic tape recorders, having been found in documentation in the 1960s. The circuit uses Japanese transistors, and the critical components are transformers.
This circuit was found in a documentation from the 90's. Power is included, and the regulating...
We find this circuit in the 80s used integrated circuit manual itself. The integrated circuit is not...
This sweep generator or current-controlled oscillator was found in Popular Electronics from...