YD2 @ The Valve Museum

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YD2

Sensibly equivalent^¶ to:

220P LP2 P220 PM2A

See also:

Range Advert

Extras ▼

Triotron The Two Margarets Other YD2 exhibits

The YD2 from Triotron is described as a high slope power valve. This translates to a battery audio output valve.

The electrodes are mounted horizontally above the pinch. The grid wire is just visible at the top of the anode.

The valve only has identification on the dome.

The balloon envelope is 44 mm in diameter, and excluding the B4 base pins is 86 mm tall.

Reference: Data-sheet Data & ¹⁰⁴³. Type YD2 was first introduced in 1930. See also 1930 adverts.

Pin Connections

B4	1	2	3	4
	a	g1	f	f

Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va	Vg	mAa	ra	gm	μ
	2.0	0.22	200	-11	15.0	4,500	2.5	9

PDF scanned from an original document held by the museum

Updated August 28, 2024.

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