PM4DX @ The Valve Museum

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PM4DX

Sensibly equivalent^¶ to:

410LF CV1151 CV1152 L410 NR15A NR16A

See also:

The Philips-Mullard (PM) Series - Mullard PM4DX Box - CV1151 short entry - CV1152 short entry - Valves for Your Set - Mullard leaflet

Extras ▼

Mullard Valve Donation from Envocare Other PM4DX exhibits

The PM4DX triode is a medium impedance design for use as a detector in TRF sets. The envelope has etched into it a 4DX and also the Mullard logo that appeared on the ORA of an aerial-coil-and earth symbol. Additionally the envelope carries a code D208.

The balloon envelope is 43 mm in diameter and, excluding the B4 base pins, is 90 mm tall.

References: 1931 data-sheet & ¹⁰⁴³. Type PM4DX was first introduced in 1928. See also 1928 adverts.

Pin Connections

B4	1	2	3	4
	a	g1	f	f

Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	4.0	0.1	150	-4.5	3.5	7,500	2.0

Thanks to Andy Cowley for supplying the above PDF datasheet.

Updated June 01, 2021.

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