Colpitts Oscillator with MOSFET (CB8141E)

Found in an American documentation from 1969, this circuit operates at a frequency determined by the resonant circuit.

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Tremolo circuit (CB9374E)
Found in a Hands On Electronics from the 90s, this circuit can be easily assembled today, as the...
High Fidelity Amplifier (CB954E)
I found tis circuit in na old documentation from 1958. The circuit uses germanium transistor...
CMOS Flip-Flop with the 4027 (CB11462E)
This is the basic configuration of a CMOS 4027 integrated circuit as a flip-flop. The circuit can...