This DK96 exhibit is from Mazda and the envelope is labelled as foreign made.

From the early 1960s battery valve radios lost out to the imported transistor radio and one way to compete was to produce components in cheaper locations.

The DK96 dry battery frequency changer is from the later range of very low filament consumption valves.

The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.

 
Pin Connections

B7G	1	2	3	4	5	6	7
	f-	a	g2	g1	g4	g3	f+,g5

 
Absolute Maximum Operating Conditions

Heptode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	1.4	0.025	85	68	0	0.6	0.14	0.8M	0.3

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}