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Voltage Tetrode ·Tetrode

6FV6

Sharp-cutoff tetrode designed specifically for VHF television-tuner RF amplification, providing front-end signal gain at television receiving frequencies.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
7FQ
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 200 mA

Description

Sharp-cutoff tetrode designed for VHF television-tuner RF amplification.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
7FQ
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
200 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

7FQ - 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

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
100000 Ω
Transconductance
0.008 S
Max plate voltage
275 V
Max screen voltage
150 V
Max plate dissipation
2.5 W
Max screen dissipation
0.5 W
Max cathode current
20 mA

Sharp-cutoff tetrode; 0.5 W promoted screen input applies for screen voltages up to 90 V; higher-voltage screen input is chart-limited.

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

Tetrode

Characteristic

  • Heater Voltage. ... .........o, 6.3 Volts

    6.3 V

    Heater Voltage. ... .........o, 6.3 Volts

  • Heater Current. .. ... ... ... .. ... 200 Ma

    200 mA

    Heater Current. .. ... ... ... .. ... 200 Ma

  • Plate Voltage. . . . ...... ... i i, 275 Volts

    275 V

    Plate Voltage. . . . ...... ... i i, 275 Volts

  • Grid No. 2 Supply Voltage. . .. ............. ... 180 Volts

    180 V

    Grid No. 2 Supply Voltage. . .. ............. ... 180 Volts

  • Grid No. 2 Voltage. ............................... See 6AMB Ratlng Chart

    2 V

    Grid No. 2 Voltage. ............................... See 6AMB Ratlng Chart

  • Positive Grid No. 1 Voltage. .. ........................ 0 Volts

    0 V

    Positive Grid No. 1 Voltage. .. ........................ 0 Volts

  • Piate Dissipation. . ........ ... .. ... .. .. ... .. ... 2.0 Watts

    2 W

    Piate Dissipation. . ........ ... .. ... .. .. ... .. ... 2.0 Watts

  • Cathode Current. . ... ... ... ... ....... 20 Ma

    20 mA

    Cathode Current. . ... ... ... ... ....... 20 Ma

  • Grid No. 1 Circuit Resistance (Self Bias) 0.5 Megohms

    0.5 Megohms

    Grid No. 1 Circuit Resistance (Self Bias) 0.5 Megohms

  • Grid No. 2 Voltage 80 Volts

    80 V

    Grid No. 2 Voltage 80 Volts

  • Grid No. 1 Voltage -1 Volt

    -1 V

    Grid No. 1 Voltage -1 Volt

  • Plate Current. ... ... .. .. . 10 Ma

    10 mA

    Plate Current. ... ... .. .. . 10 Ma

  • Grid No. 2 Current. .. ... 1.5 Ma

    1.5 mA

    Grid No. 2 Current. .. ... 1.5 Ma

  • Transconductance. . .. ... R 8000 umhos

    8000 umhos

    Transconductance. . .. ... R 8000 umhos

  • Plate Resistance. ... ... .. .. ... . ... ... ... ... 0.1 Megohm

    0.1 Megohm

    Plate Resistance. ... ... .. .. ... . ... ... ... ... 0.1 Megohm

Data set 02

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Capacitance

  • Grid #1-to-plate capacitance

    0.03 pF

  • Input capacitance

    4.5 pF

  • Output capacitance

    3 pF

  • Cathode-to-heater capacitance

    2.7 pF

Other

  • Plate voltage

    125 V

    ClassA

  • Screen voltage

    80 V

    ClassA

  • Control-grid voltage

    -1 V

    ClassA

  • Plate current

    10 mA

    ClassA

  • Screen current

    1.5 mA

    ClassA

Characteristic

  • Grid #1 voltage at 20 uA plate current

    -6 V

Data set 03

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

  • Heater voltage nominal

    6.3 V

  • Heater current

    200 mA

  • Plate voltage

    125 V

    ClassA1

  • Grid No.2 voltage

    80 V

    ClassA1

  • Grid No.1 voltage

    -1 V

    ClassA1

  • Plate resistance

    0.1 MΩ

    ClassA1

  • Transconductance

    8000 µS

    ClassA1

  • Plate current

    10 mA

    ClassA1

  • Grid No.2 current

    1.5 mA

    ClassA1

  • Grid No.1 voltage for plate current 20 µA

    -6 V

    ClassA1

Other

  • Heater voltage tolerance

    10 %

  • Maximum plate voltage

    275 V

    ClassA1

  • Maximum grid No.2 supply voltage

    180 V

    ClassA1

  • Maximum positive grid No.1 voltage

    0 V

    ClassA1

  • Maximum cathode current

    20 mA

    ClassA1

  • Maximum grid No.2 input

    0.5 W

    ClassA1;ScreenVoltage<=90V

  • Maximum plate dissipation

    2 W

    ClassA1

  • Peak heater-cathode voltage, either polarity

    200 V

    DCComponentPositive<=100V

  • Maximum grid No.1 circuit resistance

    0.5 MΩ

    ClassA1

Capacitance

  • Grid No.1-to-plate capacitance

    0.03 pF

    Maximum

  • Grid No.1 input capacitance

    4.5 pF

  • Plate output capacitance

    3 pF

  • Cathode-to-heater capacitance

    2.7 pF