Experimental “four-in-one” tetrode
Tétrode multiple expérimentale
Experimentelle Mehrfachröhre

A very curious “four-in-one” tube!

Four tetrodes, with a common control grid
Assembly: a strong triple mica plate on one side
No markings

Hauteur de l'ampoule • Bulb height • Birnen Höhe : 5"1/2 (140mm)

 

---

Le contenu de ce site est sous copyleft The content of this site is under copyleft Der Inhalt dieser Website steht unter Copyleft