MOSFET Amplifier Stage (CB26315E)

Found in a 1990s Popular Electronics, this circuit uses a small transformer matched to the impedance of the speaker being driven.

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FM Transmitter (CB17399E)
The coils for this transmitter, found in a 2002 documentation, have the following characteristics: L1 - 4...
Electronic Machine Gun (CB17369E)
Touching the sensor with your fingers, this circuit produces a machine gun sound. The circuit must...
20 V Differential Amplifier (CB4493E)
The MC1436 can also be used on this circuit found in Motorola's 1993 Linear Interface ICs. The...