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Power - Pentode (NOT beam) ·Pentode

89

Three-grid audio power-amplifier tube usable in pentode or triode connection for Class A and Class B service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
6F
Socket code
UX6
Base pins
6
Nominal heater
6.3 V / 400 mA

Description

Three-grid power amplifier tube usable in triode-connected Class A or Class B power-amplifier service.

Socket description

Small 6-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
6F
Socket code
UX6
Base pins
6
Nominal heater voltage
6.3 V
Nominal heater current
400 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

6F - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
70000 Ω
Transconductance
0.0018 S
Max plate voltage
260 V
Max screen voltage
250 V

Published promoted fields populated semantically; identical repeated sections compressed.

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

Pentode

Other

  • Plate voltage

    160 V

    ClassA;TriodeConnection

  • Control-grid voltage

    -20 V

    ClassA;TriodeConnection

  • Plate current

    17 mA

    ClassA;TriodeConnection

  • Load resistance

    7000 Ω

    ClassA;TriodeConnection

  • Power output

    0.3 W

    ClassA;TriodeConnection

  • Plate voltage

    250 V

    ClassA;TriodeConnection

  • Control-grid voltage

    -31 V

    ClassA;TriodeConnection

  • Plate current

    22 mA

    ClassA;TriodeConnection

  • Load resistance

    5500 Ω

    ClassA;TriodeConnection

  • Power output

    0.9 W

    ClassA;TriodeConnection

  • Plate voltage

    100 V

    ClassA;PentodeConnection

  • Screen voltage

    100 V

    ClassA;PentodeConnection

  • Control-grid voltage

    -10 V

    ClassA;PentodeConnection

  • Plate current

    9.5 mA

    ClassA;PentodeConnection

  • Screen current

    1.6 mA

    ClassA;PentodeConnection

  • Load resistance

    10700 Ω

    ClassA;PentodeConnection

  • Power output

    0.33 W

    ClassA;PentodeConnection

  • Plate voltage

    250 V

    ClassA;PentodeConnection

  • Screen voltage

    250 V

    ClassA;PentodeConnection

  • Control-grid voltage

    -25 V

    ClassA;PentodeConnection

  • Plate current

    32 mA

    ClassA;PentodeConnection

  • Screen current

    5.5 mA

    ClassA;PentodeConnection

  • Load resistance

    6750 Ω

    ClassA;PentodeConnection

  • Power output

    3.4 W

    ClassA;PentodeConnection

  • Peak plate current maximum

    90 mA

    ClassB;TwoTubes;TriodeConnection

  • Average grid dissipation maximum

    0.35 W

    ClassB;TwoTubes;TriodeConnection

Characteristic

  • Plate resistance

    3300 Ω

    ClassA;TriodeConnection

  • Transconductance

    1425 µS

    ClassA;TriodeConnection

  • Amplification factor

    4.7

    ClassA;TriodeConnection

  • Plate resistance

    2600 Ω

    ClassA;TriodeConnection

  • Transconductance

    1800 µS

    ClassA;TriodeConnection

  • Amplification factor

    4.7

    ClassA;TriodeConnection

  • Plate resistance

    104000 Ω

    ClassA;PentodeConnection

  • Transconductance

    1200 µS

    ClassA;PentodeConnection

  • Amplification factor

    125

    ClassA;PentodeConnection

  • Plate resistance

    70000 Ω

    ClassA;PentodeConnection

  • Transconductance

    1800 µS

    ClassA;PentodeConnection

  • Amplification factor

    125

    ClassA;PentodeConnection

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • ; 3 AMPLIFIER

    3 A

    ; 3 AMPLIFIER

  • ers with

    6.3 V

    ers with 6.3-volt heater supply. The

  • A Power-Amplifier Triode, (

    3 A

    A Power-Amplifier Triode, (2) a Class A Power-Output Pentode, and (3) a Class

  • HEeATER VOLTAGE (A. C.or D.C).ovvviinennnnen

    6.3 V

    HEeATER VOLTAGE (A. C.or D.C).ovvviinennnnen 6.3 Volts

  • HEATER CURRENT ...cvtivervncnrnanssansaannns

    400 mA

    HEATER CURRENT ...cvtivervncnrnanssansaannns 0.4 Ampere

  • PLATE VOLTAGE .......ccoveueu-s

    250 V

    PLATE VOLTAGE .......ccoveueu-s. 160 180 250 max. Volts

  • GRD VOLTAGE (Grid No

    -31 V

    GRD VOLTAGE (Grid No. 1)........ -20 -22.5 -31 Volts

  • PLATE CURRENT ...vvvenrnrennnna

    32 mA

    PLATE CURRENT ...vvvenrnrennnna 17 20 32 Milliamperes

  • SELF-BrAs RESISTOR

    970 ohm

    SELF-BrAs RESISTOR ........000vunn 1180 112% 970 Ohms

  • UnNpisTORTED PowerR OuTPUT

    0.9 W

    UnNpisTORTED PowerR OuTPUT...... 0.3 0.4 0.9 Watt

  • PLATE VOLTAGE

    250 V

    PLATE VOLTAGE ............ 100 135 180 250 max. Volts

  • ScREEN VOLTAGE (Grid No

    250 V

    ScREEN VOLTAGE (Grid No. 2) 100 135 180 250 max. Volts

  • GrID VOLTAGE (Grid No

    25 V

    GrID VOLTAGE (Grid No. 1).. -10 -13.5 -18 =25 Volts

  • PLATE CURRENT

    32 mA

    PLATE CURRENT ........... 9.5 14 20 32 Milliamperes

  • SCREEN CURRENT

    5.5 mA

    SCREEN CURRENT .......... 1.6 2.2 3.0 5.5 Milliamperes

  • AMPLIFICATION PACTOR

    125 A

    AMPLIFICATION PACTOR ..... 125 125 125 125

  • Power OutPuT*

    3.4 W

    Power OutPuT* ........... 0.33 0.75 1.5 3.4 Watts

  • PLATE VOLTAGE ...vviinrnninncnnenecennnanrnnn

    250 V

    PLATE VOLTAGE ...vviinrnninncnnenecennnanrnnn 250 max. Volts

  • PEAR PLATE CURRENT.......ovvvevenvnnnaneanns

    90 mA

    PEAR PLATE CURRENT.......ovvvevenvnnnaneanns 90 max. Milliamperes

  • AVERAGE GRID DissiPATION (Grids No

    0.35 W

    AVERAGE GRID DissiPATION (Grids No. 1 and No. 2) 0.35 max. Watt

  • Plate Voltage .....covvvivuiinnnrnnnennnensn

    180 V

    Plate Voltage .....covvvivuiinnnrnnnennnensn 180 Volts

  • Grid Voltage .......covvvieunecneiarnannnnns

    0 V

    Grid Voltage .......covvvieunecneiarnannnnns 0 Volts

  • Zero-Signal Plate Current. .....o0vivercvcaacens

    6 mA

    Zero-Signal Plate Current. .....o0vivercvcaacens 6 Milliamperes

  • Power Output {Approximate).....cecoeeunaenes

    3.5 W

    Power Output {Approximate).....cecoeeunaenes 3.5 Watts

  • Eg=

    6.3 V

    Eg= 6.3 VOLTS

  • PLATE VOLTS=

    -20 V

    PLATE VOLTS= 160 GRID VOLTS =-20

  • suppressor, while the other two grids (No

    0 V

    suppressor, while the other two grids (No. 1 PLATE VOLTS =160 GRD VOLTS=0 M

  • be employed, provided the heater voltage does ;

    0 V

    be employed, provided the heater voltage does ; .8 7 &54 8 w10 %

  • the grid (No

    3 V

    the grid (No. 3) adjacent to the plate is tied DRIVER SIGNAL VOLTS (RMS)

Characteristic

  • AMPLIFICATION FACTOR

    4.7 A

    AMPLIFICATION FACTOR ........... 4.7 4.7 4.7

  • PLATE RESISTANCE .......c0cvenn

    2600 ohm

    PLATE RESISTANCE .......c0cvenn. 3300 3000 2600 Ohms

  • TRANSCONDUCTANCE . ....vevanenn,

    1800 µS

    TRANSCONDUCTANCE . ....vevanenn, 1425 1550 1800 Micromhos

  • LoAp RESISTANCE*

    5500 ohm

    LoAp RESISTANCE* ............... 7000 6500 5500 Ohms

  • PLATE RESISTANCE

    70000 ohm

    PLATE RESISTANCE ......... 104000 92500 80000 '70000 Ohms

  • TRANSCONDUCTANCE

    1800 µS

    TRANSCONDUCTANCE ........ 1200 1350 1550 1800 Micromhos

  • LoAD RESISTANCE

    6750 ohm

    LoAD RESISTANCE .......... 10700 9200 8000 6750 Ohms

  • Effective Load Resistance (Plate-to-plate)...... «o

    9400 ohm

    Effective Load Resistance (Plate-to-plate)...... «o. 9400 Ohms

  • ling is used, a resistance of

    1 ohm

    ling is used, a resistance of 1.0 megohm may

Data set 03

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Plate Resistance

    2600 ohm

  • Transconductance

    1800 µS

  • Amplification Factor

    4.7

Other

  • Maximum Plate Voltage

    250 V

  • Power Output

    3.5 W

    ClassB,PushPull,TwoTubes,TriodeConnection

Data set 04

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Maximum plate voltage

    250 V

    Published handbook rating

  • Maximum screen voltage

    250 V

    Published handbook rating

  • Plate voltage

    250 V

    ClassA

  • Screen voltage

    250 V

    ClassA

  • Control-grid bias

    25 V

    ClassA

  • Plate current

    32 mA

    ClassA

  • Load resistance

    6750 ohm

    ClassA

  • Power output

    3.4 W

    ClassA

  • Triode-connected plate voltage

    250 V

    TriodeConnection ClassA

  • Triode-connected plate current

    31 mA

    TriodeConnection ClassA

  • Triode-connected power output

    3.4 W

    TriodeConnection ClassA

Characteristic

  • Plate resistance

    70000 ohm

    Published handbook characteristic

  • Transconductance

    1800 µS

    Published handbook characteristic

  • Heater/filament voltage

    6.3 V

    Published heater/filament rating

  • Heater/filament current

    400 mA

    Published heater/filament rating

  • Triode-connected transconductance

    5500 µS

    TriodeConnection

  • Triode-connected plate resistance

    70000 ohm

    TriodeConnection

Data set 05

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Power Output

    5.4 W

    ClassA1;PentodeConnection

  • Power Output

    900 mW

    ClassA1;TriodeConnection