20W HiFi Amplifier (T496E)

Found in a 1947 publication, this 7-tube amplifier uses four tubes in the output stage. The circuit uses a power source with a transformer.

| Clique na imagem para ampliar |

Subwoofer Amplifier (CB26271E)
Found in a Popular Electronics from the 90s, this circuit provides 100 W of power. The power...
Rhythmic Light (CB16411E)
I found this simple basic circuit of rhythmic light in a 1980 documentation. We warn you to be...
Staircase generator (CB22451E)
This circuit was found in Popular Electronics from 1992. The circuit has steps determined by...