MH41 @ The Valve Museum

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MH41

Sensibly equivalent^¶ to:

41MH AC2/HL CV1505 HLA1

Extras ▼

Osram TNMoC The National Museum of Computing - Valves Other MH41 exhibits

The MH41 is described as an indirectly heated high slope general purpose triode suitable for detector of AF amplifier service etc.

The The M-OV ellipse with the Type designation. Image slightly enhanced.

The Osram paper brand label for consumer products.

The dome with top mica visible. See MH41 for an early example with a balloon envelope and clear glass.

The classic envelope is 44 mm in diameter and, excluding the B5 base pins, is 98 mm tall.

References: Data-sheet, Data, ¹⁰⁴⁰ & ¹⁰⁴³. Type MH41 was first introduced in 1933. See also 1933 adverts.

Pin Connections

B5	1	2	3	4	5
	a	g1	h	h	k

Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	4.0	1.0	200	-1.5	5.2	13,300	6.0

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated March 14, 2023.

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