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.