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Voltage Radio Detector Converter ·Pentode-Triode

5AT8

Medium-mu triode plus sharp-cutoff pentode used as a combined oscillator and mixer in television receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9DW
Socket code
B9A
Base pins
9
Nominal heater
4.7 V / 600 mA

Description

Medium-mu triode plus sharp-cutoff pentode used as a combined oscillator and mixer in television receivers with about 40-MHz IF.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
9DW
Socket code
B9A
Base pins
9
Nominal heater voltage
4.7 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9DW - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN12G1BG1 — Control Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DW

PIN22PBP — Plate (Anode)

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DW

PIN3KAK — Cathode

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DW

PIN4H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DW

PIN5H—H — Heater

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DW

PIN61PAP — Plate (Anode)

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DW

PIN71G2AG2 — Screen Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DW

PIN81G3AG3 — Suppressor Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DW

PIN91G1AG1 — Control Grid

EIA transcription; manufacturer confirmation pending

Unverified

EIA Base Connections, printed page 131, 9DW

Section ratings

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
6000 Ω
Transconductance
0.0065 S
Amplification factor
40
Max plate voltage
300 V
Max plate dissipation
2.7 W
Rectifier max heater-cathode voltage
200 V
Rectifier warm-up time
11 s

Oscillator triode section.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
300000 Ω
Transconductance
0.0055 S
Max plate voltage
300 V
Max screen voltage
300 V
Max plate dissipation
2.3 W
Max screen dissipation
0.45 W
Rectifier max heater-cathode voltage
200 V
Rectifier warm-up time
11 s

Sharp-cutoff VHF mixer pentode 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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Conversion transconductance

    2100 uS

    MixerService

SECTION 2

Pentode

Characteristics

  • Conversion transconductance

    2800 uS

    MixerService

Data set 02

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Triode typical plate voltage

    125 V

  • Heater-cathode voltage maximum

    200 V

Characteristics

  • Triode transconductance

    8500 uS

  • Triode amplification factor

    40

  • Triode plate resistance

    5000 ohm

  • Heater warm-up time

    11 s

Application

  • Application

    Oscillator / phase inverter / vertical oscillator

SECTION 2

Pentode

Other

  • Pentode/tetrode typical plate voltage

    125 V

  • Pentode/tetrode grid2 voltage

    125 V

Characteristics

  • Pentode/tetrode transconductance

    6400 uS

  • Pentode/tetrode plate resistance

    200000 ohm

Application

  • Application

    Mixer / IF / video / general-purpose amplifier

Data set 03

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • TRIODE GRID TO~TRIO DE PLATE: (T-G TO TP)

    1.5 pF

    Capacitances | TRIODE GRID TO~TRIO DE PLATE: (T-G TO TP) 1.5 1.5 pf

Other

  • TRIODE PLATE VOLTAGE

    275 V

    Maximum Ratings | TRIODE PLATE VOLTAGE 275 VOLTS

  • POSITIVE DC TRIODE GRID VOLTAGE

    0 V

    Maximum Ratings | POSITIVE DC TRIODE GRID VOLTAGE 0 VOLTS

  • TRIODE PLATE DISSIPATION

    1.7 V

    Maximum Ratings | TRIODE PLATE DISSIPATION 1.7 VOLTS

SECTION 2

Pentode

Characteristic

  • VELOPE. IT IS DESIGNED PRIMARILY FOR USE IN

    600 mA

    | VELOPE. IT IS DESIGNED PRIMARILY FOR USE IN 600 MA. SERIES HEATER OPERATED TELEVISION

  • PLATE VOLTAGE

    125 V

    ClassA | PLATE VOLTAGE 725 125 VOLTS

  • GRID

    -1 V

    ClassA | GRID 1 VOLTAGE -1.0 -1.0 VOLTS

  • PLATE CURRENT

    12 mA

    ClassA | PLATE CURRENT 9.0 12.0 MA.

  • GRID

    2.2 mA

    ClassA | GRID 2 CURRENT 2.2 MA.

  • TRANSCONDUCTANCE

    6.5 uS

    ClassA | TRANSCONDUCTANCE 5.500 6.500 pMHOS

  • PLATE RESISTANCE (APPROX.)

    6 ohm

    ClassA | PLATE RESISTANCE (APPROX.) 300.000 6.000 OHMS

  • GRID

    -7 V

    ClassA | GRID 1 VOLTAGE (APPROX.) FOR Ib = 20 µA -6.5 -7 VOLTS

Capacitance

  • PENTODE GRID

    0.06 pF

    Capacitances | PENTODE GRID 1 TO PENTODE PLAT E:(PG1 TO PP) MAX. ~ 0.03 —j 0.06 pf

  • CATHODE TO HEATER (K TO H)

    6 pF

    Capacitances | CATHODE TO HEATER (K TO H) --3 6.0 —~ 6.0 pf

  • PENTODE GRID

    0.05 pF

    Capacitances | PENTODE GRID 1 TO TRIODE PLATE: (PGl TO TP) MAX. 0.04 0.05 pf

  • PENTODE PLATE TO TRIODE PLATE: f PP TO TP) MAX

    0.05 pF

    Capacitances | PENTODE PLATE TO TRIODE PLATE: f PP TO TP) MAX. 0.006 0.05 pf

  • HEATER WARM-UP TIME A

    11 s

    Capacitances | HEATER WARM-UP TIME A 11 SECONDS

  • LIMITS OF SUPPLIED CURRENT

    600140 mA

    Capacitances | LIMITS OF SUPPLIED CURRENT 600140 MA.

Other

  • PENTODE PLATE VOLTAGE

    275 V

    Maximum Ratings | PENTODE PLATE VOLTAGE 275 VOLTS

  • GRID

    275 V

    Maximum Ratings | GRID 2 SUPPLY VOLTAGE 275 VOLTS

  • PENTODE PLATE DISSIPATION

    2.3 W

    Maximum Ratings | PENTODE PLATE DISSIPATION 2.3 WATTS

  • GRID

    0.45 W

    Maximum Ratings | GRID 2 DISSIPATION 0.45 WATTS

  • POSITIVE DC GRID

    0 V

    Maximum Ratings | POSITIVE DC GRID 1 VOLTAGE 0 VOLTS

Data set 04

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    100 V

    VHF;OscillatorMixer

  • Plate current

    8.5 mA

    VHF;OscillatorMixer

Characteristic

  • Plate resistance

    6900 ohm

    VHF;OscillatorMixer

  • Transconductance

    5800 uS

    VHF;OscillatorMixer

  • Amplification factor

    40

    VHF;OscillatorMixer

  • Heater warm-up time

    11 s

    ControlledWarmUp

SECTION 2

Pentode

Other

  • Plate voltage

    250 V

    VHF;OscillatorMixer

  • Grid 2 voltage

    150 V

    VHF;OscillatorMixer

  • Plate current

    7.7 mA

    VHF;OscillatorMixer

  • Grid 2 current

    1.6 mA

    VHF;OscillatorMixer

Characteristic

  • Plate resistance

    750000 ohm

    VHF;OscillatorMixer

  • Transconductance

    4600 uS

    VHF;OscillatorMixer

Data set 05

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • frequency in the order of

    40 MHz

    Published in approved 6AT8A target entry; Section1

  • Heater Warm-up Time ( Average) 11

    11 seconds

    Published in approved 6AT8A target entry; Section1

  • Heater Voltage (ac/dc)

    6.3 V

    Published in approved 6AT8A target entry; Section1

  • Heater Current

    1.8 A

    Published in approved 6AT8A target entry; Section1

  • Peak Inverse Plate Voltage#

    4500 V

    Published in approved 6AT8A target entry; Section1

  • Peak Plate Current

    1300 mA

    Published in approved 6AT8A target entry; Section1

  • Average Plate Current

    210 mA

    Published in approved 6AT8A target entry; Section1

  • Plate Dissipation

    6.5 W

    Published in approved 6AT8A target entry; Section1

  • Peak value +300

    -4500 V

    Published in approved 6AT8A target entry; Section1

  • Average value -(-100

    -900 V

    Published in approved 6AT8A target entry; Section1

Capacitance

  • Heater Voltage (ac/dc) 4.7

    6.3 V

    Published in approved 6AT8A target entry; Section1

  • Heater Current , . . 0.6

    450 mA

    Published in approved 6AT8A target entry; Section1

  • Grid to Plate 1.5

    1.5 pF

    Published in approved 6AT8A target entry; Section1

  • Grid to Cathode and Heater 2

    2.4 pF

    Published in approved 6AT8A target entry; Section1

  • Plate to Cathode and Heater 0.5

    1 pF

    Published in approved 6AT8A target entry; Section1

  • Grid No.3 4.6

    4.8 pF

    Published in approved 6AT8A target entry; Section1

  • Grid No.3 0.9

    1.6 pF

    Published in approved 6AT8A target entry; Section1

  • Plate to Heater and Cathode

    8.5 pF

    Published in approved 6AT8A target entry; Section1

  • Cathode to Heater and Plate

    11.5 pF

    Published in approved 6AT8A target entry; Section1

  • Heater to Cathode

    4 pF

    Published in approved 6AT8A target entry; Section1

SECTION 2

Pentode

Other

  • frequency in the order of

    40 MHz

    Published in approved 6AT8A target entry; Section2

  • Heater Warm-up Time ( Average) 11

    11 seconds

    Published in approved 6AT8A target entry; Section2

  • Heater Voltage (ac/dc)

    6.3 V

    Published in approved 6AT8A target entry; Section2

  • Heater Current

    1.8 A

    Published in approved 6AT8A target entry; Section2

  • Peak Inverse Plate Voltage#

    4500 V

    Published in approved 6AT8A target entry; Section2

  • Peak Plate Current

    1300 mA

    Published in approved 6AT8A target entry; Section2

  • Average Plate Current

    210 mA

    Published in approved 6AT8A target entry; Section2

  • Plate Dissipation

    6.5 W

    Published in approved 6AT8A target entry; Section2

  • Peak value +300

    -4500 V

    Published in approved 6AT8A target entry; Section2

  • Average value -(-100

    -900 V

    Published in approved 6AT8A target entry; Section2

Capacitance

  • Heater Voltage (ac/dc) 4.7

    6.3 V

    Published in approved 6AT8A target entry; Section2

  • Heater Current , . . 0.6

    450 mA

    Published in approved 6AT8A target entry; Section2

  • Grid to Plate 1.5

    1.5 pF

    Published in approved 6AT8A target entry; Section2

  • Grid to Cathode and Heater 2

    2.4 pF

    Published in approved 6AT8A target entry; Section2

  • Plate to Cathode and Heater 0.5

    1 pF

    Published in approved 6AT8A target entry; Section2

  • Grid No.3 4.6

    4.8 pF

    Published in approved 6AT8A target entry; Section2

  • Grid No.3 0.9

    1.6 pF

    Published in approved 6AT8A target entry; Section2

  • Plate to Heater and Cathode

    8.5 pF

    Published in approved 6AT8A target entry; Section2

  • Cathode to Heater and Plate

    11.5 pF

    Published in approved 6AT8A target entry; Section2

  • Heater to Cathode

    4 pF

    Published in approved 6AT8A target entry; Section2