The B65 is an audio double triode with a 6.3 Volt heater. The B36 is the same valve except for the 12.6 volt heater.

The Osram paper label.

The wide glass tube envelope is 28 mm in diameter, and excluding the IO base pins, is 71 mm tall.

 
Pin Connections

IO	1	2	3	4	5	6	7	8
	g1(2)	a(2)	k(2)	g1(1)	a(1)	k(1)	h	h

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.8	250	-0	3	7.7k	1.6

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 11 November 2008