NU5 halfwave rectifier of WWII vintage. 13.5V/9.5A filament, 3kV/150mA
rating. Markings on the glass are: Admiralty Pattern 7416, and Serial
Number 6811C year 1943.
The filament is a classic hairpin of tungsten, connected at one end of
the bulb (top in the main picture)
The filament is tensioned by a spring at the other end. Note also above
and below the soldered joint between the wire and the anode.
The valve measures 250x120mm.
This file was last modified
15:09:22, Tuesday September 02, 2014