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Voltage Radio Detector Converter ·Pentode

6D6

Remote-cutoff high-frequency pentode for RF amplification or first-detector service. Its broad cutoff characteristic supports automatic volume control while high plate resistance provides useful receiver front-end gain.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
6F
Socket code
UX6
Base pins
6
Nominal heater
6.3 V / 300 mA

Description

High-frequency remote-cutoff pentode for RF amplification or first-detector service in AC, DC, universal, or automobile receivers.

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
300 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
800000 Ω
Transconductance
0.0016 S
Max plate voltage
300 V
Max screen voltage
300 V
Max plate dissipation
2.25 W
Max screen dissipation
0.25 W
Max cathode current
15 mA

Remote-cutoff RF pentode.

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

  • & PRONG Haximum Plate Voltage

    250 V

    Published table

  • SMALL BRSE| lexlmun Screen Voltage

    100 V

    Published table

  • Plate Voltage

    100 V

    ClassA; Column1

  • Plate Voltage

    250 V

    ClassA; Column2

  • Screen Voltage

    100 V

    ClassA; Column1

  • Screen Voltage

    100 V

    ClassA; Column2

  • Grid Bias

    -3

    ClassA

  • Amplification Factor

    1280

    ClassA

  • Plate Resistance

    0.25

    ClassA; Column1

  • Plate Resistance

    0.8

    ClassA; Column2

  • Transconductance

    1500 uS

    ClassA; Column1

  • Transconductance

    1600 uS

    ClassA; Column2

  • Plate Current

    8

    ClassA; Column1

  • Plate Current

    8.2

    ClassA; Column2

  • Screen Current

    2.2 mA

    ClassA; Column1

  • Screen Current

    2 mA

    ClassA; Column2

  • Grid Blas for Transconductance =

    2 V

    ClassA; Column1

  • Grid Blas for Transconductance =

    50 V

    ClassA; Column2

  • Grid Blas for Transconductance =

    -50 V

    ClassA; Column3

  • Grid Bias

    -10 V

    ClassA; Column1

  • Grid Bias

    10 V

    ClassA; Column2

  • The grid bias is not critical with an oscillator peak swing

    1 V

    ClassA

Capacitance

  • Input

    5

    Published table

  • Output

    6.5

    Published table

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    300 mA

    Nominal

  • Maximum Plate Voltage

    250 V

  • Maximum Screen Voltage

    100 V

  • Maximum Cathode Current

    15 mA

Characteristic

  • Transconductance

    1600 µS

    Typical

  • Amplification Factor

    1280

    Typical

  • Plate Resistance

    800000 ohm

    Typical

Data set 03

1948 Brimar Radio Valve Manual

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Anode Voltage

    250 V

  • Anode Current

    8.2 mA

  • Screen Voltage

    100 V

  • Screen Current

    2 mA

  • Control Grid Voltage

    -3 V

  • Cutoff Voltage

    -50 V

Data set 04

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Grid-to-Plate Capacitance

    0.007 pF

    With shield

  • Input Capacitance

    4.7 pF

  • Output Capacitance

    6.5 pF

Other

  • Plate Current

    8.2 mA

    250 V plate, 100 V screen

  • Conversion/Detector Grid Bias

    -10 V

    First detector; approximate minimum

Data set 05

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    300 mA

Data set 06

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    250 V

    ClassA

  • Screen-grid voltage

    100 V

    ClassA

  • Grid voltage

    -3 V

    ClassA

  • Plate current

    8.2 mA

    ClassA

  • Screen-grid current

    2 mA

    ClassA

Capacitance

  • Input capacitance

    4.7 pF

  • Output capacitance

    6.5 pF

  • Grid-to-plate capacitance

    0.007 pF

Data set 07

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    250 V

    Published operating/characteristic table

  • Screen Voltage

    100 V

    Published operating/characteristic table

  • Grid Voltage

    -50 V

    Published operating/characteristic table

Characteristic

  • Plate Current

    8.2 mA

    Published operating/characteristic table

  • Screen Current

    2 mA

    Published operating/characteristic table

  • Transconductance

    1600 uS

    Published operating/characteristic table

  • Plate Resistance

    0.8 ohm

    Published operating/characteristic table