This amplifier with two FETs in direct coupling (cascode) was found in a 90s Popular Electronics. The MOSFET can be of almost any type like the MPF102.
This circuit is used to cut the “click” in the loudspeaker of amplifiers when they are turned on....
This circuit for several frequencies was obtained in an American documentation from the 90s. The...
This simple circuit can be used as audio output stage for intercoms, experimental radios and other low...