We found this circuit in a 1977 documentation. The National Semiconductor's LM380 is no longer easily found, but if used on this amplifier it provides excellent reproduction quality.
This National Semiconductor circuit uses integrated circuits that are uncommon today. The circuit...
The circuit in the figure is very interesting because it simulates an SCR triggered by light. When...
This circuit is from a 1998 Electronics Now and can be easily assembled since it uses a common...