Mini amplifier (CB21697E)

The indicated fraction watt amplifier has good gain, requiring only 100 mV input for full power excitation.

Variable gain operational amplifier (CB8068E)
This circuit is from an Electronics Now from the 90s. It applies to almost any operational...
4-Channel Comparator (CB24632E)
The basis of this circuit is the HA2400 released at the time. The circuit is from a Radio...
Leak Detector (CB4550E)
This capacitor leak detector was found at Popular Electronics in June 1991. The magazine no longer...