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D418

Sensibly equivalent to:
CV1686 CV1687
    
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The D418 is a low capacity signal diode for radio or television reception.
The two CV valves based on this design CV1686 and CV1687 have ac anode resistances of 2,625 Ω and 3,375 Ω respectively.
The reverse is plain gold metal loaded screening paint.
Thanks to Mark Mallison for sending the images.
The wide glass tube envelope is  mm in diameter, and excluding the IO base pins is  mm tall.
Reference: 1043. Type D418 was first introduced in 1934.

 

Pin Connections
B4
1
2
3
4
tc
k,m
-
h
h
a

 

Absolute Maximum Operating Conditions
Diode
Vh
Ah
Va
mAa
4.0
0.18
100
1.5
Updated December08, 2018.
shape:wide.glass.tube construction:pinch type:diode age:1930.1940 base:b4 heater:4.0v pins:4 pin:1.k.m pin:2.- pin:3.h pin:4.h pin:tc.a
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