We found this circuit in a Radio Electronics magazine from June 1992. The circuit has a power stage and is used with 4.5 MHz video TV signals.
This amplifier step for small signals can use any general-purpose transistor like the BC548. The...
Found a documentation for PC from 1992, this circuit is indicated for the English power grid of...
The transistors in this circuit from an old documentation can be replaced by equivalents like the...