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See also:
The Twenty-Kilowatt Tube - Irving Langmuir
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Type VT-11 a type G Pliotron with the UV four pin bayonet base. It was used by the Signal Corps in the USA from 1918 and found service during WWI.
This version differs slightly from VT-11 in that the anode cup has been redesigned.
From the Tyne Collection.
The original box.
The box end with Type VT-11 printed on it.
Thanks to Joe Gruber for sending the images.
The balloon envelope is  mm in diameter and, excluding the UV base pins, is  mm tall.
References: J Gruber, & 1047. Type VT-11 was first introduced in 1918.


Absolute Maximum Operating Conditions
Updated October 20, 2019.
shape:balloon construction:pinch type:triode age:pre.1920 base:uv pins:4 pin:
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