The SP2 is a directly heated battery pentode from 1934. It was designed for broadcast radio reception.

The classic envelope is 43 mm in diameter and, excluding the B7 base pins, is 115 mm tall.

 
Pin Connections

B7	1	2	3	4	5	6	7	tc
	m	g1	g3	h	h	k	g2	a

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	2.0	0.18	135	135	0	3.0	1.0	0.7M	1.8

This exhibit was last updated on 02 December 2007