3 A switched regulator (CB8859E)

Found in a 90s Popular Electronics, this circuit provides a current of 3 to 5 A depending on the transistor.

LM377 Stereo Amplifier (CB25938E)
The figure shows an application of the LM377 in a small inverting stereo amplifier with output...
500 MHz Oscillator (CB9393E)
This 500 MHz oscillator has an output power of 1 W when powered by a 20 V source. The circuit was...
Headphone Amplifier (CB15592E)
We can use this amplifier with low impedance headphones with good performance. Possible...