Using transistors at the time, this circuit was found in a 1967 Ferranti documentation. The circuit is for 150-ohm transmission lines.
This two-transistor amplifier stage has a feedback network allowing a voltage gain between 10 and...
This notch filter or reject filter rejects signals of a certain frequency with good selectivity. The...
This circuit, obtained from a 1965 magazine, can still be assembled using some modern equivalent...