The Mullard PM254 is a directly heated low impedance triode. Mullard give details for the use of this triode for audio output service.

The lettering on the dome.

An attractive box to attract the consumer, made oversize to accommodate an inner protective cardboard sleeve.

The balloon envelope is 47 mm in diameter, and excluding the B4 base pins is 85 mm tall.

 
Pin Connections

B4	1	2	3	4
	a	g1	f	f

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm	μ
	4.0	0.2	200	0	-	2,150	3.0	6.5

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This exhibit was last updated on 07 January 2007