This amplifier with gains between 5 and 100 was found in the May 1988 issue of Radio Electronics magazine. The circuit requires a symmetrical power supply.
Found in a 1960 Sylvania manual, this circuit can be implemented with a modern equivalent...
We found this circuit in a 2006 publication. The circuit is simple, being powered by a 9 V...
This circuit is from a Popular Electronics from the 90s, consisting of a repeater relay for remote...