This tube is a low capacitance version of the 211.
Dimensions (l x h x p) incl.pins/tip
x 200 x 65 mm / x 7.87 x 2.56 inch
Bibliographie
Tube Lore (II) p. 78
Universal Vade-Mecum, Electron Valves and Semiconductor Devices Section 369, p. 843
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
835: ARRL Handbook 1972
Anonyme 10 Collectionneur
Just Qvigstad
835: RCA Transmitting Tubes TT-5
Emilio Ciardiello
Plus d'infos ...