Crystal Pierce Oscillator (CB6149E)

This circuit uses a 100 kHz crystal, but nearby frequencies can be obtained with appropriate crystals. Components are still common today.

| Clique na imagem para ampliar |

Small guitar amplifier (CB22150E)
We found this circuit for guitar training in an English documentation from 1989. The components are from...
Two-step relay lock (CB8835E)
This circuit produces a voltage drop in the first pulse, turning off the relay. On the second...
Tonal Corrector (CB16292E)
Readers who like sound or sound effects cannot fail to examine this interesting circuit. What we...