Clinical thermometer (CB7244E)

For measurements between 30 and 40º C this circuit was found in the documentation of 1968. The sensor is a difficult component to obtain today.

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Oscillator for Square Signals (CB19014E)
This circuit, found in documentation from the 1980s, uses an operational amplifier from that time....
Wien Bridge Oscillator (CB9039E)
This low frequency sinusoidal oscillator was obtained in documentation from the 1970s. Operational...
Remote Vibration Transducer Amplifier (CB4951E)
This circuit was found in a 1980s documentation. It is intended for remote vibration monitoring...