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Voltage - Dual Triode (similar) ·Triode-Triode

6SC7

High-mu twin triode with a common cathode, intended for voltage-amplifier service and suited to resistance-coupled audio amplification and phase-inverter circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
RETMA 8S
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 300 mA

Description

The 6SC7 is a DualTriode intended for high-mu voltage-amplifier service. Published ratings, characteristics and typical operating data from the supplied datasheet were captured.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
RETMA 8S
Socket code
IO
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
300 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

RETMA 8S - 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
53000 Ω
Transconductance
0.001325 S
Amplification factor
70
Max plate voltage
250 V
Max plate dissipation
2.5 W
Max cathode current
10 mA

Representative row for identical sections.

Section 2

Triode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Source-derived section; promoted values populated where applicable.

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

1940 RCA

Published operating points and test conditions from this source.

SECTION 2

Triode

Other

  • The 6SC7 is a new, single-ended, metal, twin triode amplifier intended

    6

    The 6SC7 is a new, single-ended, metal, twin triode amplifier intended

  • HEATER VOLTAGE (A.C. or D.C.)

    6.3 V

    HEATER VOLTAGE (A.C. or D.C.) 6.3 Volts

  • HEATER CURRENT

    300 mA

    HEATER CURRENT 0.3 Ampere

  • HEATER VOLTAGE

    6.3 V

    HEATER VOLTAGE 6.3 Volts

  • PLATE VOLTAGE 250 max. Volts

    250 V

    PLATE VOLTAGE 250 max. Volts

  • GRID VOLTAGE

    -2 V

    GRID VOLTAGE -2 Volts

  • AMPLIFICATION FACTOR

    70

    AMPLIFICATION FACTOR 70

  • PLATE CURRENT

    2 mA

    PLATE CURRENT 2 Milliamperes

  • Plate-vVoltage Supply 90

    300 V

    Plate-vVoltage Supply 90 300 Yolts

  • Plate Load RL 250000

    250000 ohm

    Plate Load RL 250000 250000 Ohms

  • following stage 0.5

    0.5 ohm

    following stage 0.5 0.5 Megohm

  • Cathode Resistor (R.) *x 3750

    1675 ohm

    Cathode Resistor (R.) *x 3750 1675 Ohms

  • voltage Output 9 55 Peak Volts

    55 V

    voltage Output 9 55 Peak Volts

  • Voltage Gain3

    42 V

    Voltage Gain3 30 42

  • 1 Voltage at plate equals Plate-Supply Voltage minus voltage drop In R and Rc. For

    1 V

    1 Voltage at plate equals Plate-Supply Voltage minus voltage drop In R and Rc. For

  • other supply voltages differing by as much as 50% from those listed, the values of re

    50 V

    other supply voltages differing by as much as 50% from those listed, the values of re-

  • 2 voltage across R at grid-current point

    2 V

    2 voltage across R at grid-current point.

  • i Voltage gain at 5 volts (RMS) output

    5 V

    i Voltage gain at 5 volts (RMS) output.

  • Heater voltage (ac or dc). . . . e o o o o

    6.3 V

    Heater voltage (ac or dc). . . . e o o o o 6.3 VOJ.tB

  • Maximum heater-cathode vOltage . « o « ¢ o ¢ o ¢ ¢ o o o ¢ ¢ 0 o s o

    90 V

    Maximum heater-cathode vOltage . « o « ¢ o ¢ o ¢ ¢ o o o ¢ ¢ 0 o s o 90 volts

  • Maximum plate voltage,

    250 V

    Maximum plate voltage, . . . . 250 volts

  • Heater voltageo e © ® ® ® © O o © 0 © O ¢ 6 O ° e © © o o © o o v o

    6.3 V

    Heater voltageo e © ® ® ® © O o © 0 © O ¢ 6 O ° e © © o o © o o v o . 6.3 volts

  • Heater cmento @ 6 ¢ 6 06 ¢ 8 6 9 © ® © @ ° @ ¢ o O 0 0 0 0 o o o o o

    300 mA

    Heater cmento @ 6 ¢ 6 06 ¢ 8 6 9 © ® © @ ° @ ¢ o O 0 0 0 0 o o o o o 300 ma

  • Phte voltage [] * ] L * L L) [] * * L LJ .' LJ L] L] [ ] * L] L] * L * [] * L - [J

    250 V

    Phte voltage [] * ] L * L L) [] * * L LJ .' LJ L] L] [ ] * L] L] * L * [] * L - [J 250 volta

  • Grid voltage. L] .. .V * LJ L] L] [] L] L] * L * * L] LJ [] ® * LJ ® L] L] L4 [] L] L L]

    -2 V

    Grid voltage. L] .. .V * LJ L] L] [] L] L] * L * * L] LJ [] ® * LJ ® L] L] L4 [] L] L L] -2 volts

  • Amplification factor. ® @ ®» o € ® @ © ® ¢ o © & © *» o o O ¢ © o & o @

    70

    Amplification factor. ® @ ®» o € ® @ © ® ¢ o © & © *» o o O ¢ © o & o @ 70

Characteristic

  • PLATE RESISTANCE

    0 ohm

    PLATE RESISTANCE 53000 approx.0Ohms

  • TRANSCONDUCTANCE

    1325 µS

    TRANSCONDUCTANCE 1325 approx.Micromhos

  • Plate resistance, . « « ¢ ¢ o o ¢ ¢ o s o s o 0 s 06 0o 06 0090 s o o

    93000 ohm

    Plate resistance, . « « ¢ ¢ o o ¢ ¢ o s o s o 0 s 06 0o 06 0090 s o o 93,000 ohms

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate Voltage

    250 V

    ClassA;EachUnit

Characteristic

  • Plate Current

    2 mA

    ClassA;EachUnit

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    250 V

    ClassA

Characteristic

  • Transconductance

    1325 uS

    ClassA

  • Plate resistance

    53000 ohm

    ClassA

  • Amplification factor

    70

    ClassA

Capacitance

  • Input capacitance

    3 pF

    Section1

  • Output capacitance

    3 pF

    Section1

Data set 04

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate Voltage

    250 V

    ClassA

  • Grid Voltage

    -2 V

    ClassA

Characteristic

  • Plate Current

    2 mA

    ClassA

Capacitance

  • Grid-to-Plate Capacitance

    2 pF

    EachSection