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.
This interesting circuit found in an American documentation from the 70's generates signals of...
The FETs of this circuit can be the BF245. The circuit is from an old documentation and can be...
This circuit can either generate signals in the astable form or be synchronized externally,...