The 42SPT is a screened pentode that was designed for 'all mains' radio's. This valve has a high gain and would be suited to intermediate frequency amplification in superhet receivers.

The classic envelope is 58 mm in diameter and, excluding the B7 base pins, is 127 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	gm
	4.0	2.0	250	250	-10.5	64	15	11

This exhibit was last updated on 07 August 2006