Equalizer Preamplifier (CB24709E)

This circuit was found in the July 1982 issue of Radio Electronics magazine. The integrated circuit is of a newly released type at the time.

| Clique na imagem para ampliar |

AC Inverter Amplifier with 5 V MC33171 (CB15270E)
This circuit can also use other series operational amplifiers such as MC33172, MC33174, MC35171,...
Frequency amplifier (CB6974E)
Found in an old Radio Electronics, this circuit applies to frequency meters for frequencies up to 100 MHz....
1-Transistor AM Radio (CB18579E)
This simple medium wave receiver with a transistor can employ any type of general-purpose...