The mid 1940's DAC32 is a dry battery diode triode that was designed for AM broadcast radio reception. Mullard describe this valve as a medium gain triode for use as an AF voltage amplifier combined with a single diode for signal or AVC (AGC) rectification.
The filament power is very low and consequently the valve is rated for a very low current.
The triode section is at the top and the diode is a vertical rod within the rectangular screening box below. The single thread filament passes centrally between the two sections.
The rod on the right is the top filament connection and it connects to the filament via a thin wire spring to keep the filament straight when it expands when hot.
The wide glass tube envelope is 30 mm in diameter and excluding the IO base pins it is 84 mm tall.
