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Voltage - Triode (single high frequency) ·Triode

5703

Subminiature medium-mu triode for UHF oscillator, Class C amplifier, and frequency-multiplier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
5703
Socket code
B7G
Base pins
5
Nominal heater
6.3 V / 200 mA

Description

The 5703 is a heater-cathode subminiature medium-mu triode intended for UHF oscillator, Class C amplifier, and frequency-multiplier applications, with flexible wire leads for direct circuit connection.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
5703
Socket code
B7G
Base pins
5
Nominal heater voltage
6.3 V
Nominal heater current
200 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

5703 - 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
Transconductance
0.005 S
Amplification factor
25.5
Max plate voltage
275 V
Max plate dissipation
3.3 W
Max cathode current
22 mA
Rectifier max heater-cathode voltage
100 V

Subminiature medium-mu triode.

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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Input capacitance

    2.6 pF

  • Output capacitance

    0.7 pF

  • Grid-to-plate capacitance

    1.2 pF

Other

  • Plate voltage

    120 V

    ClassA

  • Cathode-bias resistor

    220 ohm

    ClassA

  • Plate current

    9 mA

    ClassA

Characteristic

  • Transconductance

    5000 uS

  • Amplification factor

    25

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

    Nominal

  • Heater current

    200 mA

    Nominal

  • Plate voltage

    275 V

    Published operating table; OperatingPoint1

  • Plate voltage

    120 V

    Published operating table; OperatingPoint1

Characteristic

  • Plate current

    22 mA

    Published operating table; OperatingPoint1

  • Plate current

    9.6 mA

    Published operating table; OperatingPoint1

  • Transconductance

    5000 uS

    Published operating table; OperatingPoint1

Capacitance

  • Grid-to-plate capacitance

    1.2 pF

    Without shield

  • Input capacitance

    2.6 pF

    Without shield

  • Output capacitance

    0.7 pF

    Without shield

Data set 03

1966 Tung Sol Electronic Tubes 3 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Grid-to-plate capacitance

    1.2 pF

    WholeTube

  • Input capacitance

    2.6 pF

    WholeTube

  • Output capacitance

    0.7 pF

    WholeTube

Other

  • Maximum plate voltage

    275 V

    WholeTube

  • Maximum plate dissipation

    3.3 W

    WholeTube

  • Maximum plate current

    22 mA

    WholeTube

  • Maximum grid current

    5.5 mA

    WholeTube

  • Maximum heater-cathode voltage

    100 V

    WholeTube

  • Plate voltage

    120 V

    TypicalOperation

  • Cathode bias resistance

    220 ohm

    TypicalOperation

  • Plate current

    9.6 mA

    TypicalOperation

  • Transconductance

    5000 µS

    TypicalOperation

  • Amplification factor

    25.5

    TypicalOperation

  • Oscillator power output

    180 mW

    UHF, 400 MHz minimum test