Frequency-Corrected Astable (CB25651E)

This frequency-corrected 1 kHz circuit has a nearly perfect rectangular signal. The circuit is from a December 1993 Electronics Now magazine.

Negative Regulator 723 (CB5463E)
The basis of this circuit is the 723, an old integrated circuit not easier to find these days. The...
LM741 Variable Gain Amplifier (CB25920E)
This circuit was found in a May 1981 Radio Electronics magazine article. The circuit is offset...
10W Transistorized Amplifier (CB1369E)
The circuit presented was found in a Japanese magazine in 1973. The circuit uses transistors of...