The 3D6 is an American battery amplifier pentode. The all glass designs did not emerge until 1938, and this design is probably from 1938-39. We believe that the 3D6 was used in Canadian WS58 wireless sets for portable military communications.

The wide glass tube envelope is 28 mm in diameter and, excluding the B8B (Loctal) base pins, is 54 mm tall.

 
Pin Connections

B8B	1	2	3	4	5	6	7	8
	f	a	g2	-	-	g1	fct	f-

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	1.4	0.22	135	90	-6	5.7	0.7	2.2

Thanks to Frank Philipse for supplying the above datasheet

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