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.
Found in old documentation for radio amateurs, this circuit is intended to excite a MOSFET on the...
The lie detector we presented was created by a professional detective and found in a 1982...
This circuit allows to obtain an output pulse independent, in duration, of the action time on...