The TSP4 dating from 1936 is a screened pentode for RF or VF (video frequency) amplification typically for television use. As was standard for such valves the maximum separation between anode and control grid circuits was achieved by taking g1 to the top cap.

The classic envelope is 42 mm in diameter and, excluding the B7 base pins, is 112 mm tall.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	4.0	1.3	200	100	-2.5	8.0	1.5	4.7

This exhibit was last updated on 02 December 2007