The SP13C screened amplifier pentode was introduced in 1938. This version has the Ct8 base and the similar Mullard SP13C has a B7 base. The use would have been for If amplification in radio receivers.

The classic envelope is 41 mm in diameter and, excluding the Ct8 base pins, is 101 mm tall.

 
Pin Connections

Ct8	1	2	3	4	5	6	7	8	tc
	m	h	h	k	g3	-	g2	a	g1

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	ra	gm
	13.0	0.2	200	100	-	3	1.3M	2.2

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This exhibit was last updated on 02 December 2007