The 20P4 is purpose designed as a television line output valve.

The valve can withstand a positive anode surge of 6 kV. The screen grid can dissipate 5 Watts.

The wide glass tube envelope is 28 mm in diameter and, excluding the IO base pins, is 88 mm tall.

 
Pin Connections

IO	1	2	3	4	5	6	7	8	tc
	-	h	-	g2	g1	-	h	k	a

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Pdiss
	38	0.2	400	250	10W

This exhibit was last updated on 21 October 2000