The 20P1 is a purpose designed self oscillating television line output valve. It is designed to withstand a positive anode surge voltage of 6 kV and a negative grid surge of -1.5 kV. The screen grid can dissipate 5 W.

This valve would be seen in television receivers of the 1950s.

The classic envelope is 50 mm in diameter and, excluding the IO base pins, is 120 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	15W

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This exhibit was last updated on 19 January 2003