This amplifier with the EL84 tube is a European commercial type from Corpim mounted on a printed circuit board. The diagram appeared in a September 1958 Radio Electronics magazine.
We found this conventional source with power transistors in a 1997 publication. The output voltage...
Indicated for automotive use in an American documentation of 1975, this circuit uses components of the...
This National Semiconductor (Agora Texas) precision circuit has the following characteristics: 0.01%...