Non-inverting amplifier (CB9018E)

Found in documentation from the 70s, this circuit uses an operational one from that time. It goes for modern equivalents.

RIAA preamplifier (CB8250E)
This circuit was obtained in an Electronics World of 1968. The operational amplifiers ones are...
Light Sensor 2 (CB5974E)
This circuit works in the opposite form to the previous one and drives a relay as a load. The...
Active Bandpass Filter (CB6723E)
Found in a 1970 American publication, this circuit uses transistors of the time. These transistors...