Experimental “four-in-one” tetrode
Tétrode multiple expérimentale
Experimentelle Mehrfachröhre
A very curious “four-in-one” tube!
![Experimental four-in-one tetrode](sp036a.jpg)
Four tetrodes, with a common control grid
Assembly: a strong triple mica plate on one side
No markings
![Experimental four-in-one tetrode](sp036b.gif)
Hauteur de l'ampoule • Bulb height • Birnen Höhe : 5"1/2 (140mm)
![Experimental four-in-one tetrode](sp036c.jpg)
![Experimental four-in-one tetrode](sp036d.jpg)
![Experimental four-in-one tetrode](sp036e.jpg)
Le contenu de ce site est sous copyleft
The content of this site is under copyleft
Der Inhalt dieser Website steht unter Copyleft