1 to 25 V power supply (CB8892E)

This 2.5 A power supply was found in a 90's QST magazine. The power transistor must be mounted on a heatsink.

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12 V Flasher (CB15511E)
In the figure we show another interesting application for integrated circuit 4001. This circuit...
Loudness System (CB16760E)
This audibility or loudness control for sound equipment is from 1992 documentation. The circuit uses...
Gain 10 Tone Detector (CB4906E)
This circuit was found in an application note of the LTC1164 from Linear Technology of the 1990s....