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Moorhead-Special

 
    
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This exhibit is the Moorhead Special transmitting valve that was made for the US market. The internal gettering gives the glass a gold appearance.
Thanks to Joe Gruber for sending the images.
The balloon envelope is  mm in diameter and, excluding the base pins, is  mm tall.
Reference: Joe Gruber. Type Moorhead-Special was first introduced in 1917.

 

Pin Connections
UV
1
2
3
4
g1
f
f
a

 

Updated June 13, 2020.
shape:balloon construction:pinch type:triode age:pre.1920 base:uv pin:1.g1 pin:2.f pin:3.f pin:4.a
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