Arvin Model 444 (T1083E)

This is a 1946 post-war model radio. The 3-tube receiver has a long-known tube configuration.

| Clique na imagem para ampliar |

Noise Generator (CB3909E)
This circuit uses a diode to generate white noise for various applications. One involves the...
Full Wave Galena (CB16307E)
The use of a detector bridge instead of a single diode, as is normally done in common galena...
Voltage reference (CB20820E)
This circuit was found in documentation from the 1980s. The circuit can be designed based on...