Audio Booster (CB6181E)

This reinforcing stages from a 1960s documentation. No information is given about the transformer and the transistor admits equivalents.

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Bistable relay (CB7159E)
Found in a Hands On Electronics from the 80's, this circuit activates a relay with alternating...
Constant Current Source (CB6628E)
This 1 A circuit was found in a Philips documentation from 1966. The transistor is of the time,...
Wien Bridge Oscillator (CB4024E)
We found this circuit in the Motorola Linear Databook of 1993. It is the traditional configuration with...