Paraphase amplifier (T389E)

This 6C5 tube circuit was found in a modern tube design manual. The circuit applies to other equivalent triodes.

Color organ (CB9089E)
This was the original title given by the publication of the 80s in which we found it. Similar...
Video switch (CB8740E)
This circuit for analog video signals was found in a 90s 303 Circuits. The used digital switch is...
Trill Generator (CB21241E)
This circuit mimics the trill of a bird. We found it in an American documentation from the 90s. It is...