The 2D4B is a pair of indirectly heated signal diodes from the 1930s.

The balloon envelope is 41 mm in diameter, and excluding the B7 base pins is 74 mm tall.

 
Pin Connections

B7	1	2	3	4	5	6	7
	m	a(2)	k(2)	h	h	k(1)	a(1)

 
Absolute Maximum Operating Conditions

Diode	Vh	Ah	Va	mAa
	4.0	0.35	200	0.8

This exhibit was last updated on 09 March 2008