The 30A5 is a power audio output pentode designed for operation with low anode voltages and in transformerless designs. It can deliver 2.1 Watts at 11% total distortion.

Thanks to Graeme Hirst for sending these valves for photographing.

The thin glass tube envelope is 17.5 mm in diameter, and excluding the B7G base pins is 60 mm tall.

 
Pin Connections

B7G	1	2	3	4	5	6	7
	g3,k	g1	h	h	g1	g2	a

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pdiss
	30.0	0.15	150	150	-6.7	43	3	22,000	9.2	7.5W

Thanks to Frank Philipse for supplying the above datasheet

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This exhibit was last updated on 26 April 2008 {find valves by name}