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Voltage - Dual Triode (similar) ·Triode-Triode

7898

Rugged high-reliability subminiature twin triode for critical amplifier and control circuits, intended for stable operation under severe environmental conditions.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
B9A
Base pins
9
Nominal heater
13.5 V / 150 mA

Description

Twin triode for amplifier, driver, control, or regulator service. The supplied datasheet was reviewed for heater/filament data, maximum ratings, characteristics, typical operating conditions, capacitances, and construction details.

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
13.5 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

2 physical sections, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
10900 Ω
Transconductance
0.0055 S
Amplification factor
60
Max plate voltage
330 V
Max plate dissipation
2.75 W

Published promoted values applied where semantically applicable; additional source-table values retained in TUBE_SECTION_PARAMETER.

Section 2

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
10900 Ω
Transconductance
0.0055 S
Amplification factor
60
Max plate voltage
330 V
Max plate dissipation
2.75 W

Second physical triode section; added to align rows with SectionCount.

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

1971 RCA HB3 Binder 3 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Voltage (AC or DC)° — published value 1

    13.5 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Voltage (AC or DC)° — published value 2

    1.5 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Current at heater volts = 13.5 — published value 1

    13.5 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Current at heater volts = 13.5 — published value 2

    0.15 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Grid-Drive 0¢e ration

    0

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Grid to plate (Each unit) — published value 1

    1.6

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Grid to plate (Each unit) — published value 2

    1.6

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Heater Voltage

    13.5 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Plate Supply Voltage

    250 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Plate Resistance (Approx.)

    10900 ohm

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Transconductance

    5500

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Plate Current

    10 mA

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Grid Voltage (Approx.) for plate µa 10 — published value 1

    10 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Grid Voltage (Approx.) for plate µa 10 — published value 2

    -12 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Pin 1 -Plate of — published value 1

    1

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Pin 1 -Plate of — published value 2

    6

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Pin 2 -Grid of — published value 1

    2

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Pin 2 -Grid of — published value 2

    7

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Pin 4 -Heater — published value 1

    4

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Pin 4 -Heater — published value 2

    9

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Pin 5 -Heater

    5

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • a Heater will withstand momentary excursions from 11.0 to 16.0 volts — published value 1

    11 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • a Heater will withstand momentary excursions from 11.0 to 16.0 volts — published value 2

    16 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • 19.5 cycled one minute on and two minutes off; heater 135 ~YY/ — published value 1

    19.5

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • 19.5 cycled one minute on and two minutes off; heater 135 ~YY/ — published value 2

    135

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • in paral lel , heater volts = 13.5, plate —supply volts = 250, — published value 1

    13.5 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • in paral lel , heater volts = 13.5, plate —supply volts = 250, — published value 2

    250 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • grid volts = —3, plate load resistor (ohms) = 2000, and vibra— — published value 1

    3 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • grid volts = —3, plate load resistor (ohms) = 2000, and vibra— — published value 2

    2000 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • output voltage must not exceed 150 mi l l ivolts

    150 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • conducted underthe fol lowing conditions: Heater volts = 15.0

    15 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • PLATE VOLTS=250

    250 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

Other

  • PLATE VOLTAGE

    330 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Negative-bias value

    55 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • Positive-bias value

    0 V

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • PLATE DISSIPATION — published value 1

    2 mA

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • PLATE DISSIPATION — published value 2

    75 mA

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • For fixed-bias operation — published value 1

    0 mA

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • For fixed-bias operation — published value 2

    25 mA

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.

  • For cathode-bias operation

    1 mA

    Published datasheet value; multiple numbers on a source row represent separate limits or operating conditions.