215P @ The Valve Museum

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215P

Sensibly equivalent^¶ to:

P215

See also:

Cossor RC valves Advert, March 23, 1927 - Cossor Point One and Stentor Valves - Cossor 215P Advert, April 29, 1931 - Cossor 2 Volt Range Advert - The Latest Valves

Extras ▼

Cossor Photographic Donations Other 215P exhibits

The Cossor 215P is a directly heated battery output triode originally from about 1927 and made with a balloon envelope. First issued as the Stentor Two in 1927. The 215P had an upgrade in 1930 when the New Process valves became available. The data-sheet and this metallised version reflects the later version with a higher possible anode voltage.

Original boxes and the valve for scale.

Thanks to Trevor Wilson for sending the images.

The classic envelope is 41 mm in diameter, and excluding the B4 base pins is 85 mm tall.

Reference: ¹⁰⁴³. Type 215P 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
	2.0	0.15	150	-7.5	10.0	4,000	2.25

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated December14, 2024.

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