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Tube Tinker — Electron Tube Database
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Power - Beam (NOT sweep) ·BeamPower

6287

Specialized beam-power pulse tube designed for high-current short-duration amplifier service, with pulse ratings substantially exceeding its continuous operating capability.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9CT
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 600 mA

Description

Miniature audio beam-power pentode characterized by long life and stable performance, suitable for severe mechanical shock and vibration.

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
9CT
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9CT - 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

Beam Power

X-ray radiationInterelectrode capacitances
Plate resistance
55000 Ω
Transconductance
0.0041 S
Max plate voltage
275 V
Max screen voltage
275 V
Max plate dissipation
13.2 W
Max screen dissipation
3.2 W
Max cathode current
85 mA

Promoted from clearly identified printed ratings/characteristics; additional published operating points and capacitances retained in TUBE_SECTION_PARAMETER.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Audio operating plate voltage

    250 V

    AudioAmplifier

  • Audio operating screen voltage

    250 V

    AudioAmplifier

  • Audio power output

    4.5 W

    AudioAmplifier

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Capacitance

  • Input capacitance

    8 pF

    Section1

  • Output capacitance

    9 pF

    Section1

  • Grid-to-plate capacitance

    1.1 pF

    Section1

Other

  • Plate voltage

    250 V

    ClassA

  • Screen voltage

    250 V

    ClassA

  • Control-grid voltage

    -12.5 V

    ClassA

  • Plate current

    46 mA

    ClassA

  • Screen current

    5 mA

    ClassA

  • Load resistance

    6000 Ω

    ClassA

  • Power output

    4.5 W

    ClassA

Characteristic

  • Plate resistance

    55000 Ω

    ClassA

  • Transconductance

    4100 µS

    ClassA