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Diode (NOT rectifier) ·Diode-Diode-Diode-Diode

6JU8A

Quadruple diode for color phase detection, noise-immune color-killer circuits, and FM stereo bridge-matrix applications.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
4
Base
E9-1
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 600 mA

Description

Quadruple-diode tube for color phase detection, noise-immune color-killer circuits, and FM stereo bridge matrixing. Explicit heater variant/co-designation of 8JU8A in the approved source.

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
E9-1
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

E9-1 - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

4 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
300 V
Rectifier nominal output current
9 mA
Rectifier peak forward current
54 mA
Rectifier forward voltage drop
10 V

Representative row for four identical diode sections.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Physical diode section added to match documented multi-diode construction.

Section 3

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Physical diode section added to match documented multi-diode construction.

Section 4

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Physical diode section added to match documented multi-diode construction.

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

Characteristic

  • PlateCurrentAt10V

    60 mA

    Representative repeated diode section

Data set 02

1965 Westinghouse Data Book

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristics

  • Heater Voltage

    6.3 V

  • Heater Current

    600 mA

  • Plate Voltage

    10 V

    EachSection

  • Plate Current

    60 mA

    EachSection

Other

  • Peak Inverse Plate Voltage

    300 V

    EachSection

  • Peak Plate Current

    54 mA

    EachSection

  • DC Output Current

    9 mA

    EachSection

Data set 03

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

  • Plate current at 70 V

    60 mA

    InstantaneousValue

Other

  • Maximum heater-cathode voltage, heater positive

    300 V

    EachUnit

Data set 04

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • Peak Inverse Plate Voltage

    300 V

    EachDiode

Data set 05

1971 RCA HB3 Binder 5 of 7

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • Voltage (AC or DC)

    6.3 V

    Published table value column 1

  • Voltage (AC or DC)

    0.6 V

    Published table value column 2

  • Current at heater volts =

    6.3 V

    Published table value column 1

  • Current at heater volts =

    0.6 V

    Published table value column 2

  • respect to cathode

    300 V

    Published table value

  • Plate Current for plate volts =

    10 V

    Published table value column 1

  • Plate Current for plate volts =

    60 V

    Published table value column 2

Data set 06

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

  • Peak Heater-Cathode Voltage

    300 V

    Other

  • Peak Inverse Plate Voltage

    300 V

    MaximumRating

  • Peak Plate Current

    54 mA

    MaximumRating

  • Average Output Current

    9 mA

    MaximumRating

  • Plate Current for plate voltage of

    10 V

    MaximumRating;PublishedValue1

  • Plate Current for plate voltage of

    60 V

    MaximumRating;PublishedValue2

  • Peak Inverse Plate Voltage

    300 V

    Section1

  • Nominal Output Current

    9 mA

    Section1

  • Peak Forward Current

    54 mA

    Section1

Capacitance

  • Unit No.l

    1.8 pF

    Capacitance

  • Unit No

    2 pF

    Capacitance;PublishedValue1

  • Unit No

    2.2 pF

    Capacitance;PublishedValue2

  • Plate of Unit No

    2 pF

    Capacitance;PublishedValue1

  • Plate of Unit No

    0.62 pF

    Capacitance;PublishedValue2

  • Unit No

    3 pF

    Capacitance;PublishedValue1

  • Unit No

    1.9 pF

    Capacitance;PublishedValue2

  • Unit No

    4 pF

    Capacitance;PublishedValue1

  • Unit No

    2.2 pF

    Capacitance;PublishedValue2

  • Plate of Unit No

    4 pF

    Capacitance;PublishedValue1

  • Plate of Unit No

    0.94 pF

    Capacitance;PublishedValue2

  • Cathode of Unit No.l to Heater and Internal Shield

    1.8 pF

    Capacitance

  • Cathode of Unit No

    3 pF

    Capacitance;PublishedValue1

  • Cathode of Unit No

    1.9 pF

    Capacitance;PublishedValue2

Characteristic

  • Forward Voltage Drop

    10 V

    Section1