The 1A6E is a battery heptode frequency changer (pentagrid converter). The standard 1A6 has a 2.0 Volt filament for accumulator based LT receivers. The is E variant differs in that it is designed for use on dry cells and has a nominal 1.4 Volt filament.
Thanks to Mark from Vintage-parts for sending this image.
The classic envelope is mm in diameter, and excluding the UX6 base pins is mm tall.
Reference: 1043. Type 1A6E was first introduced in 1940.
Absolute Maximum Operating Conditions¶
Updated March 20, 2017. shape:classic construction:pinch type:heptode age:1940.1950 base:ux6 heater:1.4v pins:6 pin:1.f+ pin:2.a pin:3.g2 pin:4.g1 pin:5.g3.g5 pin:6.f- pin:tc.g4