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Voltage Radio Detector Converter ·Pentode-Triode

5GJ7

Combined triode-pentode used as an oscillator and mixer or frequency converter in television or VHF communications receivers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
9QA
Socket code
B9A
Base pins
9
Nominal heater
5.6 V / 450 mA

Description

Miniature types used as combined oscillator and mixer tubes in color and black-and-white television receivers utilizing an intermediate frequency in the order of K,G 3p ,IS 40 MHZ. Outlines section, 6J; requires miniature 9- 9QA contact socket. Types 4GJ7/XCF801, 5GJ7/LCF801, and 8GJ7/PCF801 are identical with type 6GJ7/ECF801 except for heater ratings. 4GJ7/ 5GJ7/ 6GJ7/ 8GJ7/

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
9QA
Socket code
B9A
Base pins
9
Nominal heater voltage
5.6 V
Nominal heater current
450 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9QA - 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
5400 Ω
Transconductance
0.011 S
Amplification factor
78
Max plate voltage
140 V
Max plate dissipation
1.8 W
Max cathode current
22 mA

Ampliframe triode-pentode for television oscillator-mixer applications with controlled warm-up.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
350000 Ω
Transconductance
0.011 S
Max plate voltage
275 V
Max screen voltage
275 V
Max plate dissipation
2.4 W
Max screen dissipation
0.55 W
Max cathode current
20 mA

Ampliframe triode-pentode for television oscillator-mixer applications with controlled warm-up.

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

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Triode plate voltage

    100 V

    TriodeSection; OscillatorMixer

  • Triode grid voltage

    -3 V

    TriodeSection; OscillatorMixer

  • Triode plate current

    15 mA

    TriodeSection; OscillatorMixer

Characteristic

  • Triode amplification factor

    20

    TriodeSection

SECTION 2

Pentode

Other

  • Pentode plate voltage

    170 V

    PentodeSection

  • Pentode screen voltage

    120 V

    PentodeSection

  • Pentode grid voltage

    -1.2 V

    PentodeSection

  • Pentode plate current

    10 mA

    PentodeSection

  • Pentode screen current

    3 mA

    PentodeSection

Characteristic

  • Pentode transconductance

    2350 uS

    PentodeSection

Data set 02

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage (ac/dc) XCF8

    1

    Published value from supplied target entry

  • Heater Current

    8 volts

    Published value from supplied target entry

  • Plate-Supply Voltage

    600 volts

    Published value from supplied target entry

  • DC Plate Voltage

    275 volts

    Published value from supplied target entry

  • Grid-No

    600 volts

    Published value from supplied target entry

  • DC Grid-No

    275 volts

    Published value from supplied target entry

  • DC Grid-No.l (Control-Grid) Voltage

    -50 volts

    Published value from supplied target entry

  • Cathode Current

    20 mA

    Published value from supplied target entry

  • Plate Dissipation

    2.4 watts

    Published value from supplied target entry

  • Grid-No

    0.55 watt

    Published value from supplied target entry

  • DC Plate Voltage

    170 volts

    Published value from supplied target entry

  • DC Grid-No

    120 volts

    Published value from supplied target entry

  • DC Grid-No.l Voltage

    -1.2 volts

    Published value from supplied target entry

  • Amplification Factor

    20

    Published value from supplied target entry

  • Plate Resistance (Approx.)

    0.35 megohm

    Published value from supplied target entry

  • Transconductance

    11000

    Published value from supplied target entry

  • Plate Current

    10 mA

    Published value from supplied target entry

  • Grid-No

    3 mA

    Published value from supplied target entry

  • voltage to

    100 volts

    Published value from supplied target entry

  • 2 volts, screen-grid dissipation is limited

    2 volts

    Published value from supplied target entry

  • Heater Warm-up Time (Average)

    11 seconds

    Published value from supplied target entry

  • Average Cathode Current

    22 mA

    Published value from supplied target entry

  • Plate Dissipation

    2.5 watts

    Published value from supplied target entry

  • Plate Voltage

    135 volts

    Published value from supplied target entry

  • Grid Voltage

    -1 volts

    Published value from supplied target entry

  • Amplification Factor

    78

    Published value from supplied target entry

  • Plate Resistance (Approx.)

    5400 ohms

    Published value from supplied target entry

  • Plate Current

    11.5 mA

    Published value from supplied target entry

  • Input Resistance*

    275 ohms

    Published value from supplied target entry

  • Grid Voltage (Approx.) for transconductance of

    150

    Published value from supplied target entry

  • Grid Voltage (Approx.) for transconductance of

    -2.5 volts

    Published value from supplied target entry

Other

  • Voltage* ±

    110 volts

    Published value from supplied target entry

  • Grid-No.l Voltage for grid-No.l current of

    1.3 volts

    Published value from supplied target entry

  • 2 volts, maximum screen-grid dissipation

    2 volts

    Published value from supplied target entry

  • Peak Heater-Cathode Voltage ±

    100 volts

    Published value from supplied target entry

Capacitance

  • Grid to Plate

    0.62 pF

    Published value from supplied target entry

  • Grid to Cathode, Heater, and Internal Shield

    5 pF

    Published value from supplied target entry

  • Plate to Cathode, Heater, and Internal Shield

    3.5 pF

    Published value from supplied target entry

  • Heater to Cathode

    2.6 pF

    Published value from supplied target entry

  • Input Capacitance*

    11.2 pF

    Published value from supplied target entry