The S.435N is an indirectly heated HF pentode introduced in 1933. The original version was on a B5 base but a B7 based version was marketed from 1935.
The balloon envelope is 46 mm in diameter and, excluding the B5 base pins, is 116 mm tall.
References: Datasheet, 1046 & 1043. Type S435N was first introduced in 1933.
Absolute Maximum Operating Conditions¶
PDF scanned from an original document held by the museum
Updated April 26, 2013. shape:balloon construction:pinch type:pentode age:1930.1940 base:b5 heater:4.0v pins:5 pin:1.g2 pin:2.g1 pin:3.h pin:4.h pin:5.k.g3 pin:tc.a