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Power - Pentode (NOT beam) ·Pentode-Triode

6T9

Combination high-mu triode and power pentode for audio-frequency circuits, with the pentode serving as the output power amplifier.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
EIA 12FM
Socket code
B12C
Base pins
12
Nominal heater
6.3 V / 930 mA

Description

TECHNICAL DATA 383 Plate Resistance (ApPprox.) ...........oveeevvennren 54000 58000 ohms Transconduct8neCe .............c00vveemevsnnnoonnns 1300 1200 pmhos Plate Current .............coiivrirernrennnnnnnnnnnn 0.8 1 mA Diode Units MAXIMUM RATINGS (Design-Maximum Values) Plate Current (Each Unit) ..........iriiiinrrrrerennnnnnns . 6.6 HIGH-MU TRIODE— POWER PENTODE 619 Duodecar type used in audio-frequency circuits. The triode unit is used as a voltage amplifier; the pen- tode unit is used as a power amplifier. Outlines sec- tion, 8B; requires duodecar 12-contact socket. Heater Voltage (BC/dC) ........oitiinirerrnrnrsnraronnonsensnnes 6.3 volts Heater Current .. ..............iiiiiinnninnsinnseneeenaieanannns 0.93 ampere Heater-Cathode Voltage: Peak value ... .. . . i i ittt te e, 200 max volts Average value ....................... e Ceresean 100 max volts Direct Interelectrode Capacitances: Pentode Section: Grid No.l to Plate .. ....... ... . e, 0.2 pF Grid No.1 to Cathode, Heater, Grid

Socket description

Duodecar 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
EIA 12FM
Socket code
B12C
Base pins
12
Nominal heater voltage
6.3 V
Nominal heater current
930 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

EIA 12FM - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
100000 Ω
Transconductance
0.0065 S
Max plate voltage
275 V
Max screen voltage
275 V
Max plate dissipation
12 W
Max screen dissipation
2 W

Power pentode section.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
45000 Ω
Transconductance
0.0021 S
Amplification factor
95
Max plate voltage
300 V
Max plate dissipation
1.5 W

High-mu triode section.

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 1

Pentode

Characteristic

  • Plate Resistance (ApPprox.) ...........oveeevvennren 54000

    58000 ohm

    Plate Resistance (ApPprox.) ...........oveeevvennren 54000 58000 ohms

  • Plate Resistance (ADDroX.) .........c.uiriiirein it ieinrinannnns

    0.1 ohm

    Plate Resistance (ADDroX.) .........c.uiriiirein it ieinrinannnns 0.1 megohm

  • Load Resistance . ... ..........iiiiirinrinresenanessasnaneeananas

    5000 ohm

    Load Resistance . ... ..........iiiiirinrinresenanessasnaneeananas 5000 ohms

Other

  • Transconduct8neCe .............c00vveemevsnnnoonnns 1300

    1200 µS

    Transconduct8neCe .............c00vveemevsnnnoonnns 1300 1200 pmhos

  • Plate Current .............coiivrirernrennnnnnnnnnnn 0.8

    1 mA

    Plate Current .............coiivrirernrennnnnnnnnnnn 0.8 1 mA

  • Heater Voltage (BC/dC) ........oitiinirerrnrnrsnraronnonsensnnes

    6.3 V

    Heater Voltage (BC/dC) ........oitiinirerrnrnrsnraronnonsensnnes 6.3 volts

  • Heater Current .. ..............iiiiiinnninnsinnseneeenaieanannns

    930 mA

    Heater Current .. ..............iiiiiinnninnsinnseneeenaieanannns 0.93 ampere

  • Peak value ... .. . . i i ittt te e, 200 max volts

    200 V

    Peak value ... .. . . i i ittt te e, 200 max volts

  • Average value ....................... e Ceresean 100 max volts

    100 V

    Average value ....................... e Ceresean 100 max volts

  • Grid No.l to Plate .. ....... ... . e,

    0.2 pF

    Grid No.l to Plate .. ....... ... . e, 0.2 pF

  • 3 )L I

    11 pF

    3 )L I 11 pF

  • Shield . ... i e e it

    11 pF

    Shield . ... i e e it 11 pF

  • tt 2.6 pF

    2.6 pF

    tt 2.6 pF

  • Grid to Cathode, Heater, and Internal Shield

    3.4 pF

    Grid to Cathode, Heater, and Internal Shield .................. 3.4 pF

  • Plate to Cathode, Heater, and Internal Shield .............. .e

    1.1 pF

    Plate to Cathode, Heater, and Internal Shield .............. .e 1.1 pF

  • Plate Voltage ....... ... ... ittt iinnennnnnnns 300

    275 V

    Plate Voltage ....... ... ... ittt iinnennnnnnns 300 275 volts

  • Grid-No.2 (Screen-Grid) Voltage .................. —_

    275 V

    Grid-No.2 (Screen-Grid) Voltage .................. —_ 275 volts

  • Grid-No.1 (Control-Grid) Voltage, Positive-bias value 0

    0 V

    Grid-No.1 (Control-Grid) Voltage, Positive-bias value 0 0 volts

  • Plate Dissipation ..............coverinrrnrnranennas 1.5

    12 W

    Plate Dissipation ..............coverinrrnrnranennas 1.5 12 watts

  • Grid-No.2 Input ...........cviuiiriininennoennaaans —_

    2 W

    Grid-No.2 Input ...........cviuiiriininennoennaaans —_ 2 watts

  • Plate VoltBBE ...........c.0iiiitiiirenenneeronseoneanecsenananans

    250 V

    Plate VoltBBE ...........c.0iiiitiiirenenneeronseoneanecsenananans 250 volts

  • tt tasensssnassnnn —

    2 V

    tt tasensssnassnnn —2 volts

  • i aireannnns

    45000 ohm

    i aireannnns 45000 ohms

  • TransconductBNCe . ... .........citiiuitientennrnrnnnnaranannnsnnns

    2100 µS

    TransconductBNCe . ... .........citiiuitientennrnrnnnnaranannnsnnns 2100 pmhos

  • Plate Current . . e

    1.5 mA

    Plate Current . . e 1.5 mA

  • iiere

    250 V

    iiere 250 volts

  • Grid-No.2 Voltage ...........cottiiinrinrnnnunsrenensneeenannnnaean

    260 V

    Grid-No.2 Voltage ...........cottiiinrinrnnnunsrenensneeenannnnaean 260 volts

  • Grid-No.l Voltage .. ...........iiiniiriiintrrinrennnaeneanoneanes —

    8 V

    Grid-No.l Voltage .. ...........iiiniiriiintrrinrennnaeneanoneanes —8 volts

  • Peak AF Grid-No.l Voltage .......... ...ttt ennnnnns

    8 V

    Peak AF Grid-No.l Voltage .......... ...ttt ennnnnns 8 volts

  • Zero-Signal Plate Current ...............c.c.iiireenrreennnnnn

    85 mA

    Zero-Signal Plate Current ...............c.c.iiireenrreennnnnn 85 mA

  • Maximum-Signal Plate Current ..................cc¢iiriiinrnnn

    39 mA

    Maximum-Signal Plate Current ..................cc¢iiriiinrnnn. 39 mA

  • Zero-Signal Grid-No.2 Current ..................iiiirnrurrnnnnn

    2.5 mA

    Zero-Signal Grid-No.2 Current ..................iiiirnrurrnnnnn 2.5 mA

  • .....0 7 mA

    7 mA

    .....0 7 mA

  • TranscondUCtBNCE ... .......c.oviiririeninrnenssenenenanneanenennnn

    6500 µS

    TranscondUCtBNCE ... .......c.oviiririeninrnenssenenenanneanenennnn 6500 pmhos

  • Maximum-Signal Power Output ............c.iiriiniinnnnnnnnns

    4.2 W

    Maximum-Signal Power Output ............c.iiriiniinnnnnnnnns 4.2 watts

  • For fixed-bias operation ............... srrienas . 0.5

    0.26 ohm

    For fixed-bias operation ............... srrienas . 0.5 0.26 megohm

  • For cathode-bias operation ..................... 1*

    0.5 ohm

    For cathode-bias operation ..................... 1* 0.5 megohm

  • * For cathode-bias operation of the triode unit, 8 maximum resistance of 10 megohms can be

    10 ohm

    * For cathode-bias operation of the triode unit, 8 maximum resistance of 10 megohms can be

  • used provided the plate dissipation never exceeds

    0.26 W

    used provided the plate dissipation never exceeds 0.26 watt.

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    250 V

    ClassA

  • Screen Voltage

    250 V

    ClassA

  • Grid Voltage

    -8 V

    ClassA

  • Load Resistance

    5000 ohm

    ClassA

  • Power Output

    4.2 W

    ClassA

Characteristic

  • Plate Current

    35 mA

    ClassA

SECTION 2

Triode

Other

  • Plate Voltage

    250 V

    ClassA

  • Grid Voltage

    -2 V

    ClassA

Characteristic

  • Plate Current

    1.5 mA

    ClassA