This transistorized stage has a high gain, being adjusted by VR1. The circuit can be used as an excellent audio preamp. We found this circuit in a 1996 English publication.
Found in an Electronics World of 1966 this circuit is intended for use with a microphone as an...
This circuit is from 2001 documentation with the purpose of controlling a pump that fills a water...
The circuit shown in the figure was found in the Linear Applications Handbook by National...