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Voltage - Triode (single) ·Triode

DC90

Low-voltage miniature triode for battery-operated electronic service; available source material does not establish a narrower application confidently.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7G
Base pins
-
Nominal heater
1.4 V / 50 mA

Description

Battery triode designed as mixer, oscillator and amplifier for VHF/FM receivers.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B7G
Base pins
-
Nominal heater voltage
1.4 V
Nominal heater current
50 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
9800 Ω
Transconductance
0.0012 S
Amplification factor
11.8
Max plate voltage
140 V
Max plate dissipation
0.6 W
Max cathode current
5.5 mA

Published ratings and characteristics promoted from the printed technical data.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    1.4 V

    Nominal

  • HeaterCurrentNominal

    50 mA

    Nominal

  • Maximum Plate Voltage

    90 V

  • Maximum Plate Dissipation

    0.6 W

  • Maximum Cathode Current

    5.5 mA

Characteristic

  • Transconductance

    1200 µS

    Typical

  • Amplification Factor

    11.8

    Typical

  • Plate Resistance

    9800 ohm

    Typical

Data set 02

1963 Philips Electron Tubes Handbook V1

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid capacitance

    0.8 pF

  • Plate capacitance

    1.3 pF

  • Grid-to-plate capacitance

    3.3 pF

Other

  • Plate voltage

    67.5 V

    Typical characteristics

  • Grid voltage

    0 V

    Typical characteristics

  • Plate current

    4.2 mA

    Typical characteristics

  • Plate voltage

    90 V

    SelfOscillatingFrequencyChanger

  • Oscillator voltage

    5.5 V

    SelfOscillatingFrequencyChanger

  • Grid resistor

    1 Mohm

    SelfOscillatingFrequencyChanger

  • No-load plate voltage

    140 V

  • Maximum grid current

    5.5 mA

Characteristic

  • Transconductance

    1200 uS

    Typical characteristics

  • Noise figure

    18 dB

    SelfOscillatingFrequencyChanger

Data set 03

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Chauffage : direct par C.C. Ve

    1.4 V

    Published datasheet condition

  • alimentation série ou pa- I,

    50 mA

    Published datasheet condition

  • Capacitances Cg

    0.8 pF

    Published datasheet condition

  • Cag

    3.3 pF

    Published datasheet condition

  • Vg = 40 67,5

    90 v

    Published datasheet condition

  • Vg = 0 0

    -3 V

    Published datasheet condition

  • la = 1,5 4,2

    3 mA

    Published datasheet condition

  • s = 0,9 1,2

    1.1 mA

    Published datasheet condition

  • Va

    90 V

    Published datasheet condition

  • Vose

    5.5 V

    Published datasheet condition

  • Rg

    1 MΩ

    Published datasheet condition

  • Published value

    10 V

    Published datasheet condition

  • L~ »

    1 A

    Published datasheet condition

  • I L/

    7 A

    Published datasheet condition

  • Ry

    4 A

    Published datasheet condition

  • T _

    4 V

    Published datasheet condition

  • DC

    90 A

    Published datasheet condition

  • Published value

    9.2 v

    Published datasheet condition

  • 0 2 2 6

    8 V

    Published datasheet condition

  • U jort ™ Va -_

    -90 V

    Published datasheet condition

  • Published value

    3 A

    Published datasheet condition

Other

  • Vao = max.,

    140 V

    Published datasheet condition

  • Va = max. S

    0 V

    Published datasheet condition

  • Wa = max.,

    0.6 W

    Published datasheet condition

  • Ix = max,

    5.5 mA

    Published datasheet condition

  • Rg = max.,

    3 MΩ

    Published datasheet condition

  • Rg (Wge

    0.4 W

    Published datasheet condition

  • Rg (Wge0,4 W)

    10 MΩ

    Published datasheet condition