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Voltage - Triode (single) ·Triode

7246

Directly heated subminiature triode for oscillator and amplifier service to approximately 500 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
4
Nominal heater
1.25 V / 150 mA

Description

The 7246 is a four-lead subminiature filamentary triode designed for high-frequency oscillator, Class C amplifier, detector, frequency-multiplier and mixer service with very low heater power.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
4
Nominal heater voltage
1.25 V
Nominal heater current
150 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
Transconductance
0.0027 S
Amplification factor
22
Max plate voltage
150 V
Max plate dissipation
0.7 W
Max cathode current
7.5 mA

Published electrical section from 7246.pdf; identical repeated sections compressed when applicable.

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

1938 Raytheon

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • The CK7246 is a

    500 MHz

    The CK7246 is a 500 megacycle, filament type triode of subminiatwe construction designed for use

  • Plate Voltage

    150 V

    Plate Voltage 150 volts

  • Plate Current

    7.5 mA

    Plate Current 7.5 ma.

  • Grid Current

    1.2 mA

    Grid Current 1.2 ma,

  • Grid Voltage

    -30 V

    Grid Voltage —30 volts

  • Plate Dissipation

    0.7 W

    Plate Dissipation 0.7 watts

  • Filament Voltage (dc)

    1.25 V

    Filament Voltage (dc) 1.25 volts

  • F ilament Current

    150 mA

    F ilament Current 150 ma,

  • Plate Voltage

    105 V

    Plate Voltage 105 volts

  • Grid Voltage

    -2.5 V

    Grid Voltage —2.5 volts

  • Transconductance

    2700 µS

    Transconductance 2700 pmhos

  • Plate Current

    45 mA

    Plate Current 45 ma

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate Current Maximum

    7.5 mA

  • GridCurrentMaximum

    1.2 mA

  • Service

    Oscillator / Class C amplifier / detector / frequency multiplier / mixer

Characteristic

  • FrequencyCapability

    500 MHz

Capacitance

  • Grid To Plate Capacitance

    1.5 pF

Data set 03

1966 Tung Sol Electronic Tubes 4 of 4

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Grid-to-plate capacitance

    1.5 pF

    WholeTube

  • Input capacitance

    1.6 pF

    WholeTube

  • Output capacitance

    1.9 pF

    WholeTube

  • Grid To Plate

    1.5 pf

    PublishedTable

  • Plate Voltage

    15 VOLTS

    PublishedTable

  • Plate Current

    7.5 MA

    PublishedTable

  • Grid Current

    1.2 MA

    PublishedTable

  • Grid

    -3 VOLTS

    PublishedTable

  • Plate Dissipation

    7 WATTS

    PublishedTable

  • Plate Voltage

    105 voLTs

    PublishedTable

  • Transconductance

    200 uMHOS

    PublishedTable

  • Plate Current

    4.5 MA

    PublishedTable

Other

  • Plate voltage

    105 V

    ClassA1

  • Grid voltage

    -2.5 V

    ClassA1

  • Plate current

    4.5 mA

    ClassA1