We found this circuit in a 90s 73 magazine for radio amateurs. The circuit has 3 W of power and can use modern equivalent MOSFETs.
This circuit was found in a 1964 documentation. It shows how to achieve automatic gain control for...
Using transistors at the time, this circuit was found in a 1967 Ferranti documentation. The...
This circuit, which controls both the temperature and the level of a liquid in a reservoir, was...