The DD41 from Mazda was introduced in 1938. This double diode was designed for signal rectification and features an internal screen as well as external metalisation. It was probably designed for early Television use.

The classic envelope is 32 mm in diameter and, excluding the MO base pins, is 68 mm tall.

 
Pin Connections

MO	1	2	3	4	5	6	7	8
	h	k(2)	a(2)	s	a(1)	m	k(1)	h

 
Absolute Maximum Operating Conditions

Diode	Vh	Ah	Va	mAa
	4.0	0.5	175	5.0

Thanks to Frank Philipse for supplying the above datasheet

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This exhibit was last updated on 02 December 2007 {find valves by name}