Phonographic Preamplifier (CB20012E)

This configuration is from the 70s, having been found in an American documentation. The transistors can be BC549 for Q1 and BC548 for Q2.

| Clique na imagem para ampliar |

LED beacon (CB20490E)
This sole beacon which has a battery charged by photocells was found in documentation from 1991....
7 W amplifier TBA810 (CB15211E)
The supply voltage of this circuit can be between 4 and 20 W. The power depends on the voltage and the...
5 to 60 kHz FM Demodulator (CB25782E)
This 555 IC circuit was found in the November 1994 issue of Radio Electronics magazine. The...