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Voltage - Dual Triode (similar) ·Triode-Triode

DCC90

Battery-operated miniature RF double triode designed primarily for portable transmitters, including push-pull RF power-amplifier and oscillator service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
B7G
Socket code
B7G
Base pins
7
Nominal heater
1.4 V / 220 mA

Description

Miniature RF double triode primarily for battery-operated portable transmitters, including push-pull RF amplifier and oscillator service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
B7G
Socket code
B7G
Base pins
7
Nominal heater voltage
1.4 V
Nominal heater current
220 mA
Parallel heater voltage
1.4 V
Parallel heater current
220 mA
Series capable
Yes

B7G - 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
8300 Ω
Transconductance
0.0018 S
Amplification factor
15
Max plate voltage
135 V
Max plate dissipation
1 W

Battery-operated RF double triode for push-pull amplifier and oscillator service.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
8300 Ω
Transconductance
0.0018 S
Amplification factor
15
Max plate voltage
135 V
Max plate dissipation
1 W

Second physical triode section; added to align rows with SectionCount.

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 Mullard

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Filament Voltage Series

    2.8 V

  • Filament Current Series

    110 mA

  • Filament Voltage Parallel

    1.4 V

  • Filament Current Parallel

    220 mA

  • Plate Voltage

    90 V

    EachSection

  • Grid Voltage

    2.5 V

    EachSection

  • Plate Current

    3.7 mA

    EachSection

  • Amplification Factor

    15 ratio

    EachSection

  • Plate Resistance

    8300 ohm

    EachSection

  • Transconductance

    1800 uS

    EachSection

  • Plate-to-Plate Capacitance

    0.32 pF

    BetweenSections

  • Grid-Filament Capacitance

    0.9 pF

    EachSection

  • Plate-Filament Capacitance

    1 pF

    EachSection

  • Plate-Grid Capacitance

    3.2 pF

    EachSection

Other

  • Plate Voltage

    135 V

    PushPull; RFAmplifier; 40MHz

  • Grid Voltage

    -20 V

    PushPull; RFAmplifier; 40MHz

  • Plate Current

    15 mA

    EachSection; PushPull; 40MHz

  • RF Power Output

    2 W

    PushPull; 40MHz

  • Maximum Plate Voltage

    135 V

    Intermittent

  • Maximum Plate Current

    15 mA

    EachSection; Intermittent

  • Maximum Plate Dissipation

    1 W

    EachSection; Intermittent

Data set 02

1963 Philips Electron Tubes Handbook V1

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid capacitance

    0.9 pF

  • Plate capacitance

    1 pF

  • Grid-to-plate capacitance

    3.2 pF

  • Inter-section plate capacitance

    0.32 pF

Other

  • Plate voltage

    90 V

    EachTriode

  • Grid voltage

    -2.5 V

    EachTriode

  • Plate current

    3.7 mA

    EachTriode

  • Plate voltage

    135 V

    PushPull RF 40MHz

  • Plate current

    30 mA

    TwoTubes PushPull RF 40MHz

  • Power output

    2 W

    PushPull RF 40MHz

  • Maximum plate current

    30 mA

    IntermittentOperation

Characteristic

  • Transconductance

    1800 uS

    EachTriode

  • Plate resistance

    8.3 kohm

    EachTriode

Data set 03

1967 Mullard Receiving Tubes for Maintenance

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Interplate Capacitance

    0.32 pF

    EachSection

  • Grid-to-Filament Capacitance

    0.9 pF

    EachSection

  • Plate-to-Filament Capacitance

    1 pF

    EachSection

  • Plate-to-Grid Capacitance

    3.2 pF

    EachSection

Characteristic

  • Plate Voltage

    90 V

    EachSection

  • Grid Voltage

    -2.5 V

    EachSection

  • Plate Current

    3.7 mA

    EachSection

  • Amplification Factor

    15

    EachSection

  • Plate Resistance

    8300 ohm

    EachSection

  • Transconductance

    1800 uS

    EachSection

Other

  • Plate Voltage

    135 V

    PushPull;RFAmplifierOrOscillator;40MHz;Intermittent

  • Grid Voltage

    -20 V

    PushPull;RFAmplifierOrOscillator;40MHz;Intermittent

  • Plate Current

    15 mA

    PushPull;RFAmplifierOrOscillator;40MHz;Intermittent

  • Grid Current

    2.5 mA

    PushPull;RFAmplifierOrOscillator;40MHz;Intermittent

  • Plate Dissipation

    1 W

    PushPull;RFAmplifierOrOscillator;40MHz;Intermittent

  • Power Output

    2 W

    PushPull;RFAmplifierOrOscillator;40MHz;Intermittent

Data set 04

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    1.35 V

  • Heater current

    220 mA

  • Typical plate voltage

    90 V

    EachTriode

  • Typical grid voltage

    -2.5 V

    EachTriode

  • Typical plate current

    3.7 mA

    EachTriode

Capacitance

  • Grid-grid capacitance

    0.9 pF

    EachTriode

  • Anode-grid capacitance

    3.2 pF

    EachTriode

  • Anode-anode capacitance

    0.32 pF

    EachTriode