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Voltage Pentode - Remote Cutoff (single) ·Pentode

6DA6

High-gain remote-cutoff pentode for variable-gain RF and IF amplification in receiver and communications equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9BA
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 200 mA

Description

High-gain remote-cutoff pentode for RF and IF amplifier service.

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

9BA - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
1000000 Ω
Transconductance
0.0036 S
Amplification factor
5
Max plate voltage
300 V
Max screen voltage
300 V
Max plate dissipation
2.25 W
Max screen dissipation
0.45 W
Max cathode current
16.5 mA

Remote-cutoff RF pentode for variable-gain Class-A amplifier service.

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

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    200 mA

  • EquivalentType

    EF89

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    250 V

    ClassA

  • Screen voltage

    100 V

    ClassA

  • Control-grid bias magnitude

    2 V

    ClassA

  • Plate current

    9 mA

    ClassA

  • Screen current

    3 mA

    ClassA

  • Plate resistance

    1000000 ohm

    ClassA

  • Transconductance

    3600 uS

    ClassA

Characteristics

  • Input capacitance

    5.5 pF

  • Output capacitance

    5.1 pF

  • Grid-to-plate capacitance

    0.002 pF

Data set 03

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    250 V

    RFIFAmplifier

  • Screen voltage

    100 V

    RFIFAmplifier

  • Control-grid voltage

    -1.95 V

    RFIFAmplifier

  • Plate current

    9 mA

    RFIFAmplifier

  • Screen current

    3 mA

    RFIFAmplifier

  • Application

    High-gain remote-cutoff RF/IF pentode

    Section1

Characteristic

  • Plate resistance

    900000 Ω

    Section1

  • Transconductance

    5000 µS

    Section1

Data set 04

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Heater voltage

    6.3 V

  • Heater current

    200 mA

  • Transconductance

    4000 uS

  • Plate resistance

    0.8 MOhm

  • Grid No

    100 volts

    PublishedLine: Grid No.2 voltage 100. 85 100 volts

  • Grid No

    0 volt

    PublishedLine: Grid No.3 voltage 0 0 0 volt

  • Grid No

    -1 volts

    PublishedLine: Grid No.1 voltage -2 -1%) -1%*) volts

  • ) in case of grid cwrrent piasing max

    22 megohms

    PublishedLine: ')‘in case of grid cwrrent piasing max, 22 megohms

  • increased to a value of

    1.5 volts

    PublishedLine: increased to a value of 1.5 volts at least..

  • Supply voltage

    200 volts

    PublishedLine: Supply voltage 250 200 volts

  • Grid No

    0 volt

    PublishedLine: Grid No.3 voliage 0 0 volt

  • Grid No

    -20 volts

    PublishedLine: Grid No.1 bias -1.55 -20 ~1.95 -20 volts

  • resistance

    2500 ohms

    PublishedLine: resistance 2400 - 2500 ~ ohms

Other

  • Plate voltage

    300 V

  • Plate dissipation

    2.25 W

  • Screen-grid voltage

    300 V

  • Screen-grid dissipation

    0.45 W

  • Cathode current

    16.5 mA

  • Grid No

    300 volts

    PublishedLine: Grid No.2 voltage 300 volts

  • Grid No

    550 volts

    PublishedLine: Grid No.2 voltage (without current) : 550 volts

  • Grid No

    3 megohms

    PublishedLine: Grid No.1 circuit resistance +) 3 megohms

  • cathode

    20000 ohms

    PublishedLine: : cathode 20,000 ohms

  • Voltage between heater and cathode

    100 volts

    PublishedLine: Voltage between heater and cathode 100 volts

  • Grid o

    10000 ohms

    PublishedLine: Grid o, 3 circult resistance : 10,000 ohms

  • Supply Voltage

    250 volts

    PublishedLine: Supply Voltage' 250 . 250 250 250 volts

  • Plate resistor

    0.1 megohm

    PublishedLine: Plate resistor 0.22. 0.1 0.22 0.1 megohm

  • resistor

    0.47 megohm

    PublishedLine: resistor 0.68 0.27 1.0 0.47 megohm