The MS4 from M-OV is described as a general purpose screened-grid valve for use in RF amplification in receivers. The valve was available in both clear and metallised finishes.

The MS4B is a 'maximum gain' improvement and dates from the early 1930's.

The wire mesh is the screening grid (g2) and the anode consists of two small flat plates.

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

 
Pin Connections

B5	1	2	3	4	5	tc
	g2	g1	h	h	k	a

 
Absolute Maximum Operating Conditions

Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	μ
	4.0	1.0	200	60	-1.5	2.4	0.3	0.9M	1.9	1,700

Thanks to Frank Philipse for supplying the above PDF datasheet

 

This exhibit was last updated on 09 June 2010