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6N7S

Soviet dual power triode designed for low-frequency power amplification. Its identical sections provide moderate gain and plate resistance with several watts of dissipation each, making it suitable for push-pull audio output and related amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: IO
Base pins: 8
Nominal heater: 6.3 V / 810 mA

Description

The 6H7C double triode is designed for ampli- JEeHUs] MOIHOCTH HH3KOH YacTOTHL.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 810 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 11000 Ω
Transconductance: 0.0034 S
Amplification factor: 35
Max plate voltage: 300 V
Max plate dissipation: 5.5 W

Bilingual Russian/English datasheet; English text used as primary extraction source.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 11000 Ω
Transconductance: 0.0034 S
Amplification factor: 35
Max plate voltage: 300 V
Max plate dissipation: 5.5 W

Second identical physical triode section; added to align physical rows with SectionCount.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

195X Russian

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater voltage
6.3 V
Published nominal heater condition.
Heater current
800 mA
Published heater current.
Transconductance
2600 µS
Published characteristic; normalized to µS.
Amplification factor
35
Published characteristic.

Other

Maximum plate voltage
300 V
Published limiting operating value.
Maximum plate dissipation
2.75 W
Published limiting operating value.

Data set 02

1970 Russian Tubes Mashpriborintorg

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

U
63 V
Published datasheet line: U, 63V ,? 175%55mA
I
81050 mA
Published datasheet line: I, 81050 mA P =42W
U
204 V
Published datasheet line: U, 204V S 34X mA/V
Uy
—6 V
Published datasheet line: Uy —6V 13 35
L)
65720 mA
Published datasheet line: L) 65720 mA R, 11kQ
) Kaxgzoro rtpuona npu Ugr
=0 V
Published datasheet line: ?) Kaxgzoro rtpuona npu Ugr =0, U, =300 V.
For each triode at U y
=0 V
Published datasheet line: For each triode at U,y =0, U, =300 V.
) IAI H U
=205 V
Published datasheet line: ) IAI?H U, =205V, Uyr=—5V, Uy _a;y=35 V, R, =25 kQ, Ry, =05 k.
U
69 V
Published datasheet line: U, 69V 57V
U
300 V
Published datasheet line: U, 300V
P
55 W
Published datasheet line: P, 55W
Uy
100 V
Published datasheet line: Uy 100V

Other

U
69 V
Published datasheet line: U, 69V 57V
U
300 V
Published datasheet line: U, 300V
P
55 W
Published datasheet line: P, 55W
Uy
100 V
Published datasheet line: Uy 100V
PublishedValue
200 V
Published datasheet line: 200V

Data set 03

1981 Russian Tubes Katsnelson and Larionov

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Nominal heater voltage
6.3 V
Published source value
Nominal heater current
810 mA
Published source value
Transconductance
3400 uS
Published operating point
Plate resistance
11000 Ohm
Published operating point
Amplification factor
35
Published operating point