Sensibly equivalent¶ to:
The 6SN7W is an American glass tubular version of the mid 1930s metal double triode valve. The data-sheet makes it clear that this a premium quality version of the 6SN7GT designed for use where shock and vibration are a factor such as in airborne military equipment. The design probably dates from the mid to late 1940's but the glass foot construction is later.
The construction uses a glass disc base and no pinch. This would assist in making a rugged version.
The wide glass tube envelope is 28 mm in diameter and excluding the IO base pin length, stands 69 mm high.
Reference: Datasheet. Type 6SN7WGT was first introduced in 1956.
Absolute Maximum Operating Conditions¶
Updated February 21, 2014. shape:wide.glass.tube construction:glass.foot type:double.triode age:1940.1950 base:io heater:6.3v pins:8 pin:1.g1(2) pin:2.a(2) pin:3.k(2) pin:4.g1(1) pin:5.a(1) pin:6.k(1) pin:7.h pin:8.h