This configuration appears at several points in this section, obtained from different sources. This is from American documentation. The gain is 20 and the transistor can be a BC549.
Indicated for vinyl media recovery, this circuit is from the 80's, having been found in an...
This circuit aims to take advantage of two old telephone sets in an efficient domestic intercom...
This circuit can be used for signaling a panel with a common incandescent lamp. The lamp will...