This 1967 General Electric circuit makes use of an array of 3 (integrated) transistors for an amplifier stage. The circuit has a 500 mV output.
This is the receiver for the previous circuit transmitter. Similarly, no information about the...
This tuning-free circuit was found in an old operating amplifier manual. The setting can serve as...
This grounding test circuit was found in an American 80's documentation. The circuit is for the...