Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Power - Beam (NOT sweep) ·BeamPower

6Y6G

Beam-power amplifier designed for Class-A audio-output service, providing several watts from comparatively low plate and screen supply voltages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7AC
Socket code
IO
Base pins
8
Nominal heater
6.3 V / 1.25 A

Description

6Y6G is a BeamPower vacuum tube documented in the RCA Receiving Tube Manual. The supplied excerpt was reviewed for heater data, section arrangement, maximum ratings, electrical characteristics, interelectrode capacitances, typical operating conditions, and stated applications.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7AC
Socket code
IO
Base pins
8
Nominal heater voltage
6.3 V
Nominal heater current
1.25 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7AC - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1Pin 1—NCVerified

12L6GT/25L6GT manufacturer basing, 7AC

PIN2Pin 2—H — HeaterVerified

12L6GT/25L6GT manufacturer basing, 7AC

PIN3Pin 3AP — Plate (Anode)Verified

12L6GT/25L6GT manufacturer basing, 7AC

PIN4Pin 4AG2 — Screen GridVerified

12L6GT/25L6GT manufacturer basing, 7AC

PIN5Pin 5AG1 — Control GridVerified

12L6GT/25L6GT manufacturer basing, 7AC

PIN7Pin 7—H — HeaterVerified

12L6GT/25L6GT manufacturer basing, 7AC

PIN8Pin 8ABP — Beam-Forming PlateGroup AC8Verified

12L6GT/25L6GT manufacturer basing, 7AC

PIN8Pin 8AK — CathodeGroup AC8Verified

12L6GT/25L6GT manufacturer basing, 7AC

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
18300 Ω
Transconductance
0.0071 S
Max plate voltage
200 V
Max screen voltage
200 V
Max plate dissipation
12.5 W
Max screen dissipation
1.75 W

Beam-power section; the three envelope variants share the same electrical entry.

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

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Plate voltage

    135 V

    ClassA

  • Screen voltage

    135 V

    ClassA

  • Control-grid voltage

    -13.5 V

    ClassA

  • Signal peak voltage

    13.5 V

    ClassA

  • No-signal plate current

    58 mA

    ClassA

  • Maximum-signal plate current

    60 mA

    ClassA

  • No-signal screen current

    3 mA

    ClassA

  • Maximum-signal screen current

    17 mA

    ClassA

  • Load resistance

    2000 Ω

    ClassA

  • Second harmonic distortion

    2.5 %

    ClassA

  • Third harmonic distortion

    9 %

    ClassA

  • Power output

    3.6 W

    ClassA

Characteristic

  • Amplification factor

    70

    ClassA

  • Plate resistance

    10000 Ω

    ClassA

  • Transconductance

    7000 µS

    ClassA

Data set 02

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Heater Current

    1.35 A

    Heater Current 1,35 amp

  • No=Signal Plate Qurrent

    58 mA

    No=Signal Plate Qurrent 58 ma

  • Heater voltage (ac or dc). . . . o . e v oo+

    6.3 V

    Heater voltage (ac or dc). . . . o . e v oo+ 6.3 volts

  • Heater negative with respect to cathode . e o o o

    180 V

    . Heater negative with respect to cathode . e o o o 180 volts

  • Maximum plate voltage, . . . . . e.0o o o o

    200 V

    Maximum plate voltage, . . . . . e.0o o o o 200 volts

  • Maximum grid #2 supply voltage . e o o o o

    200 V

    Maximum grid #2 supply voltage . e o o o o 200 volts

  • Fixead bias, . . . . o o o o e e oo o

    0.1 MΩ

    Fixead bias, . . . . o o o o e e oo o 0,1 megohm

  • Heater voltage , L . 6.3

    6.3 V

    Heater voltage , L . 6.3 6.3 volts

  • Heater current , L] LJ 1.25

    1.25 A

    Heater current , L] LJ 1.25 1.25 amperes

  • Grid #2 voltage, L L 135

    135 V

    Grid #2 voltage, L L 135 135 volts

  • Transconductance , . . , . 7000

    7100 µS

    Transconductance , . . , . 7000 7100 umhos

  • Zero-gignal plate current, 58

    61 mA

    Zero-gignal plate current, 58 61 ma

  • Zero-signal grid #2 current, . 3 3.5

    2.2 mA

    Zero-signal grid #2 current, . 3 3.5 2.2 ma

  • Maximum-signal grid #2 current L) 1.5

    9 mA

    Maximum-signal grid #2 current L) 1.5 9 ma

Data set 03

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Typical plate voltage

    135 V

Data set 04

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Capacitance

  • Input capacitance

    15 pF

  • Output capacitance

    11 pF

  • Grid-to-plate capacitance

    0.7 pF

Other

  • Plate voltage

    200 V

    ClassA

  • Screen-grid voltage

    135 V

    ClassA

  • Grid voltage

    -14 V

    ClassA

  • Load resistance

    2600 ohm

    ClassA

  • Power output

    6 W

    ClassA

Characteristic

  • Plate resistance

    18300 ohm

    ClassA

  • Transconductance

    4100 uS

    ClassA

Data set 05

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    1.25 A

    Nominal

  • Plate voltage

    135 V

    ClassA; OperatingPoint1

  • Screen voltage

    135 V

    ClassA; OperatingPoint1

  • Grid 1 voltage

    -13.5 V

    ClassA; OperatingPoint1

  • Load resistance

    2000 ohm

    ClassA; OperatingPoint1

  • Power output

    3.6 W

    ClassA; OperatingPoint1

  • Total harmonic distortion

    10 %

    ClassA; OperatingPoint1

  • Plate voltage

    200 V

    ClassA; OperatingPoint2

  • Screen voltage

    135 V

    ClassA; OperatingPoint2

  • Grid 1 voltage

    -14 V

    ClassA; OperatingPoint2

  • Load resistance

    2600 ohm

    ClassA; OperatingPoint2

  • Power output

    6 W

    ClassA; OperatingPoint2

  • Total harmonic distortion

    10 %

    ClassA; OperatingPoint2

Characteristic

  • Zero-signal plate current

    58 mA

    ClassA; OperatingPoint1

  • Zero-signal screen current

    3.5 mA

    ClassA; OperatingPoint1

  • Plate resistance

    9300 ohm

    ClassA; OperatingPoint1

  • Transconductance

    7000 uS

    ClassA; OperatingPoint1

  • Zero-signal plate current

    61 mA

    ClassA; OperatingPoint2

  • Zero-signal screen current

    2.2 mA

    ClassA; OperatingPoint2

  • Plate resistance

    18300 ohm

    ClassA; OperatingPoint2

  • Transconductance

    7100 uS

    ClassA; OperatingPoint2

Data set 06

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Plate voltage

    200 V

    ClassA

  • Grid #2 voltage

    135 V

    ClassA

  • Grid #1 voltage

    -14 V

    ClassA

  • Zero-signal plate current

    61 mA

    ClassA

  • Maximum-signal plate current

    66 mA

    ClassA

  • Zero-signal grid #2 current

    2.2 mA

    ClassA

  • Maximum-signal grid #2 current

    9 mA

    ClassA

  • Plate resistance

    14300 ohm

    ClassA

  • Load resistance

    2600 ohm

    ClassA

  • Power output

    6 W

    ClassA

  • Total harmonic distortion

    10 %

    ClassA

Characteristic

  • Transconductance

    5100 uS

    ClassA

Capacitance

  • Grid-to-plate capacitance

    0.8 pF

  • Input capacitance

    13 pF

  • Output capacitance

    7 pF