This tube is a low capacitance version of the 211.
Abmessungen (BHT) inkl. Stifte/Spitzli
x 200 x 65 mm / x 7.87 x 2.56 inch
Literatur
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
