The Pen220A is very different in shape and design from the Pen220 and this valve was probably made by Cossor.

The Pen220A is a battery output pentode from the 1930s.

The anode load impedance is given as 6,000 Ohms.

The classic envelope is 42 mm in diameter and, excluding the B5 base pins, is 95 mm tall.

 
Pin Connections

B5	1	2	3	4	5
	a	g1	f(-)	f(+)	g2

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	2.0	0.2	150	150	-9.0	18	3.6	270,000	2.2	1.1	7%

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This exhibit was last updated on 07 February 2003