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Voltage Triode Pentode ·Pentode-Triode

7734

High-perveance triode plus sharp-cutoff pentode designed specifically for electronically regulated power-supply circuits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 900 mA

Description

High-perveance triode plus sharp-cutoff pentode for electronically regulated power supplies.

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
9
Nominal heater voltage
6.3 V
Nominal heater current
900 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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
3000 Ω
Transconductance
0.008 S
Max plate voltage
275 V
Max plate dissipation
7 W
Max cathode current
50 mA

Published Westinghouse ratings, characteristics, typical operating conditions, and capacitances extracted from supplied source.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
340000 Ω
Transconductance
0.0032 S
Max plate voltage
330 V
Max screen voltage
275 V
Max plate dissipation
1 W
Max screen dissipation
0.5 W

Published Westinghouse ratings, characteristics, typical operating conditions, and capacitances extracted from supplied source.

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

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    900 mA

  • Grid To Plate Capacitance

    1.5 pF

  • Input Capacitance

    5.5 pF

  • Output Capacitance

    1.3 pF

  • Plate Voltage

    150 V

  • Plate Current

    70 mA

    ZeroBias

Other

  • PeakCathodeCurrentMaximum

    175 mA

SECTION 2

Pentode

Characteristic

  • Grid To Plate Capacitance

    0.2 pF

  • Input Capacitance

    8 pF

  • Output Capacitance

    2.4 pF

  • Plate Voltage

    150 V

  • Screen Voltage

    150 V

  • Grid Voltage

    -2 V

  • Plate Resistance

    340000 ohm

  • Transconductance

    3200 uS

Other

  • HeaterCathodeVoltageMaximum

    300 V

    HeaterNegative