12SC7 @ The Valve Museum

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12SC7

Sensibly equivalent^¶ to:

CV540

Extras ▼

RCA Donation by Stephen Gough. Other 12SC7 exhibits

The 12SC7 is a metal enveloped double triode, these valves have been used in guitar amplifiers and the ECC83 is used for upgrades.

We also have the 6SC7 that differs only in heater rating.

The RCA logo. The rust indicates that the envelope is steel.

Made in USA.

The thin metal tube envelope is 25 mm in diameter, and excluding the IO base pins is 51 mm tall.

References: Data-sheet, ¹⁰⁴³, ³⁰⁰² & ¹⁰⁴⁰. Type 12SC7 was first introduced in 1939. See also 1939 adverts.

Pin Connections

IO	1	2	3	4	5	6	7	8
	m	a(2)	g1(2)	g1(1)	a(1)	k	h	h

Absolute Maximum Operating Conditions^¶

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	12.6	0.15	250	-2	2.0	53,000	1.325

Thanks to Frank Philipse for supplying the above PDF datasheet.

Updated November 08, 2024.

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