Two-input amplifier (CB21661E)

The critical component of this 1967 amplifier is the driver transformer. The circuit has both high and low impedance input.

Negative Pulse Detector (CB14835E)
This circuit trips when a negative pulse is applied to its input or when the voltage drops below a...
Developing Table For Silk Screen (CB4445E)
This is an old 1988 circuit consisting of a timer or time control for exposing silk-screen arrays. The...
Triangular and square signal generator (CB21448E)
This circuit was taken from an old American documentation. It can be built with modern op amps. The...