We found this circuit in a 1971 documentation. The circuit can be assembled with more modern transistors such as BC548 for Q1, BC558 for Q2 and BD135 for Q3.
This small audio amplifier uses germanium transistors and a 12 V supply. The circuit is from a...
Found in a 1995 Hands-On Electronics, this circuit generates a sinusoidal signal whose frequency...
Many readers may not know MOS-SCR yet. It is a SCR in which the input is equivalent to the gate of a...