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VT-A

Sensibly equivalent to:
SE1444
    
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This exhibit is another VT-A from the Moorhead-Marconi-DeForest era. The base cap carries the Marconi logo but the time this valve was produced the contract had been cancelled.
Thanks to Joe Gruber for sending the images.
The balloon envelope is 44 mm in diameter and, excluding the UV base pins, is 104 mm tall.
Reference: Joe Gruber. Type VT-A was first introduced in 1917.

 

Pin Connections
UV
1
2
3
4
g1
f
f
a

 

Updated August 04, 2020.
shape:balloon construction:pinch type:triode age:pre.1920 base:uv pins:4 pin:1.g1 pin:2.f pin:3.f pin:4.a
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