MVSG @ The Valve Museum

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MVSG

See also:

Cossor Vari-μ Valves Advert - Cossor Mica Bridge Mounting Advert - Cossor Mica Bridge Advert - Cossor 220VSG & MVSG Advert - Cossor 220VSG & MVSG Advert - Variable-mu Valves - Cossor SG Valves Advert - 215SG, 220SG, 220VSG, 220VS. MSG/HA, 41MSG, MSG/LA, MVSG, MS/PenA, MS/Pen, MVS/Pen, DVSG, DS/Pen & DVS/Pen Advert

Extras ▼

Cossor G8LSD Valve Collection Other MVSG exhibits

The MVSG from Cossor has a mirror finish inside the envelope from the magnesium gettering. Externally the envelope is covered with a metallic paint to add to overall screening.

Introduced in 1932, Cossor in 1935 describe the MVSG as a special variable-mu screened grid valve. The special feature being the control of volume by altering the grid bias. It is clear that variable-mu technology was still relatively novel.

The balloon envelope is 42 mm in diameter and, excluding the B5 base pins, is 120 mm tall.

References: Data-sheet & ¹⁰⁴³. Type MVSG was first introduced in 1932. See also 1932 adverts.

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
	4.0	1.0	200	80	-1.5	7.5	0.75	0.2M	2.5

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated March 20, 2023.

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