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Voltage Radio Detector Converter ·Diode-Diode-Pentode

6BW8

Double-diode pentode designed primarily for television horizontal phase detection plus sound IF, limiter, and AGC service. Its functional center is television signal processing rather than general radio detection.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
3
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 450 mA

Description

6BW8 is a DualDiodePentode device. Double-diode pentode for horizontal phase detection plus sound IF/limiter/AGC 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
-
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
450 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

3 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Published promoted values applied where applicable; additional table data retained as parameters.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
250000 Ω
Transconductance
0.0052 S
Max plate voltage
250 V
Max screen voltage
330 V
Max plate dissipation
3 W

Diode 1.

Section 3

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Diode 2.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • Plate Voltage

    250 V

    Published operating/characteristic table

  • Screen Voltage

    110 V

    Published operating/characteristic table

  • Grid Voltage

    -10 V

    Published operating/characteristic table

Characteristic

  • Plate Current

    10 mA

    Published operating/characteristic table

  • Screen Current

    3.5 mA

    Published operating/characteristic table

  • Transconductance

    5200 uS

    Published operating/characteristic table

  • Plate Resistance

    0.25 ohm

    Published operating/characteristic table

SECTION 2

Pentode

Other

  • Plate Voltage

    250 V

    Published operating/characteristic table

  • Screen Voltage

    110 V

    Published operating/characteristic table

  • Grid Voltage

    -10 V

    Published operating/characteristic table

Characteristic

  • Plate Current

    10 mA

    Published operating/characteristic table

  • Screen Current

    3.5 mA

    Published operating/characteristic table

  • Transconductance

    5200 uS

    Published operating/characteristic table

  • Plate Resistance

    0.25 ohm

    Published operating/characteristic table

Data set 02

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • Typical Plate Voltage

    250 V

  • Typical Screen Voltage

    110 V

SECTION 2

Pentode

Characteristic

  • Average Diode Current At5 V

    20 mA

    Section2

SECTION 3

Diode

Characteristic

  • Average Diode Current At5 V

    20 mA

    Section3

Data set 03

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristics

  • Voltage (AC or DC) — published value 1

    6.3 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Voltage (AC or DC) — published value 2

    10 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Current — published value 1

    0 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Current — published value 2

    45 A

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • and heater

    4.8

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • and heater

    2.6

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • and heater

    1.3

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • and heater

    1.2

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Supply Voltage

    250 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.2 Supply Voltage

    110 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Resistance (Approx ) — published value 1

    0 ohm

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Resistance (Approx ) — published value 2

    25 ohm

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Transconductance

    5200

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid-No.2 Current

    3.5 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Current

    10 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • plate µa = 10 — published value 1

    10 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • plate µa = 10 — published value 2

    -10 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 2 -Diode Cathode

    2

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 5 -Heater

    5

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • For grid-No.2 voltages between 165

    165 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • and 330 volts

    330 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Current for plate volts = 5 — published value 1

    5 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Plate Current for plate volts = 5 — published value 2

    20 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

Other

  • Grid No.l to prate — published value 1

    0 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Grid No.l to prate — published value 2

    2 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • diode plate

    0.006 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • PLATE VOLTAGE

    330 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • GRID-No.2 (SCREEN~RID) SUPPLY VOLTAGE

    330 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Negative-bias value

    55 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Positive-bias value

    0 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • For grid-No.2 voltages up to 165 volts — published value 1

    165 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • For grid-No.2 voltages up to 165 volts — published value 2

    0.55 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • PLATE DISSIPATION

    3 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater negative with respect to cathode. 200 max

    200 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Heater positive with respect to cathode. 200b max

    200 V

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • For fixed-bias operation

    1 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • For cathode-bias operation

    5 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • PLATE CURRENT

    5 mA

    Published datasheet value; multiple values represent separate source-table limits or conditions.

SECTION 2

Pentode

Characteristics

  • Pin 4 -Heater — published value 1

    4

    Published datasheet value; multiple values represent separate source-table limits or conditions.

  • Pin 4 -Heater — published value 2

    8

    Published datasheet value; multiple values represent separate source-table limits or conditions.