Sensibly equivalent¶ to:
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.
Absolute Maximum Operating Conditions¶
Updated October 13, 2019. 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