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 circuit allows the listening of undersea sounds using a special transducer. Operational...
The presented circuit uses an operational one of the time. The circuit is from an 80's manual and...
This circuit can be found in all 723 manufacturer's manuals. This circuit is specifically from...