This circuit is from a documentation about the MC1723, Motorola equivalent of the well-known 723. The transistor admits equivalent and must be mounted in a good heat sink.
We found this circuit in a 1977 publication for radio amateurs. It serves to test general purpose...
The purpose of this circuit is to amplify the signal of a medium or high impedance microphone,...
This unusual circuit from a Popular Electronics of the 90s uses LED indicators, operating as a...