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Voltage - Triode (single high frequency) ·Triode

7552

High-mu ceramic-metal pencil triode for low-noise UHF cathode-drive amplification to 1 GHz and above in mobile and aircraft equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
-
Nominal heater
6.3 V / 225 mA

Description

High-mu ceramic-metal pencil triode for low-noise UHF cathode-drive amplification to 1000 MHz and above in mobile/aircraft equipment.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B9A
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
225 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
3000 Ω
Transconductance
0.0135 S
Amplification factor
80
Max plate voltage
250 V
Max plate dissipation
2.5 W
Max cathode current
25 mA

High-mu low-noise RF 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

1960 RCA Industrial and Communications Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    6.3 V

  • HeaterOrFilamentCurrent

    225 mA

  • MaximumOperatingFrequency

    1000 MHz

    Approximate/useful limit

  • OperationalAltitude

    100000 ft

    WithoutPressurization

  • Noise Figure

    16.5 dB

    Published table condition

Data set 02

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Heater voltage

    6.3 V

  • Heater current

    225 mA

  • Plate supply voltage

    125 V

    LowNoiseRF

  • Cathode resistor

    50 ohm

    LowNoiseRF

  • Plate current typical

    13 mA

    LowNoiseRF

  • Power gain minimum

    13 dB

    550MHz

  • Noise figure maximum

    7.5 dB

    550MHz

  • Maximum plate voltage

    250 V

  • Maximum plate current

    25 mA

  • Maximum plate dissipation

    2.5 W

Characteristic

  • Amplification factor minimum

    60

    EquipmentDesign

  • Amplification factor maximum

    100

    EquipmentDesign

  • Transconductance minimum

    10000 uS

    EquipmentDesign

  • Transconductance maximum

    17000 uS

    EquipmentDesign

Data set 03

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Amplification Factor

    80

    UHF pencil-triode service

  • Transconductance

    13500 µS

    UHF pencil-triode service

  • Grid-to-Plate Capacitance

    2.4 pF

    UHF pencil-triode service

  • Grid-to-Cathode-and-Heater Capacitance

    4.4 pF

    UHF pencil-triode service

  • Plate-to-Cathode-and-Heater Capacitance

    0.04 pF

    UHF pencil-triode service

  • Cathode Warm-Up Time

    10 s

    UHF pencil-triode service

Other

  • Maximum DC Plate Voltage

    250 V

    UHF pencil-triode service

  • Maximum DC Cathode Current

    25 mA

    UHF pencil-triode service

  • Plate Dissipation

    2.5 W

    UHF pencil-triode service