The PM12M is a screened pentode for RF amplification. It is one of the early valves made with the anode as top cap connection, later types placed the control grid connection to the top cap for even greater separation of input and output circuits.

The PM12V variable μ pentode was released in 1932, and was replaced by the PM12M in 1933. PM stands for Philips Mullard, the names of the companies.

The metalised classic envelope is 43 mm in diameter and, excluding the B4 base pins, is 110 mm tall.

 
Pin Connections

B4	1	2	3	4	tc
	g2	g1	f	f	a

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	gm
	2.0	0.18	150	90	0	2.5	0.5	1.4

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This exhibit was last updated on 02 December 2007