9D2 @ The Valve Museum

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9D2

Sensibly equivalent^¶ to:

12VPA ARP3 C50N CV1106 CV1321 VP1322 VP13C VR106

See also:

Brimar Ten Times Tested Advert

Extras ▼

Brimar The John Hodgson Collection Other 9D2 exhibits

The 9D2 is a variable μ RF pentode. The 200 mA heater requirement indicates that this valve is suitable for series heater chain use.

The base has the Brimar logo heat pressed into it.

Inside the outer cylindrical screen is the anode cylinder, three wire grids and an oxide coated cathode in the centre.

The classic envelope is 38 mm in diameter, and excluding the B7 base pins is 96 mm tall.

References: Data-sheet & ¹⁰⁴³. Type 9D2 was first introduced in 1934. See also 1934 adverts.

Pin Connections

B7	1	2	3	4	5	6	7	tc
	nc	a	g3	h	h	k	g2	g1

Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	μ
	13	0.2	250	125	-1	10.0	3.5	0.6M	1.65	1,000

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated January 04, 2022.

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