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E1707

 
    
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The E1707 is a single signal diode. Visually it looks to be half of a 6AL5.
The serial number of 23 and the heater voltage written in pen.
Another exhibit where the paper label has been torn to reveal a single signal diode.
The thin glass tube envelope is 17 mm in diameter, and excluding the B7G base pins is 44 mm tall.
Reference: Observation.

 

Pin Connections
B7G
1
2
3
4
5
6
7
-
k
h
h
-
a
-

 

Absolute Maximum Operating Conditions
Triode
Vh
6.3
Updated April 14, 2019.
shape:thin.glass.tube construction:all.glass type:diode age:1950.1960 base:b7g heater:6.3v pins:7 pin:1.- pin:2.k pin:3.h pin:4.h pin:5.- pin:6.a pin:7.-
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