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Diode (NOT rectifier) ·Diode-Diode-Diode

6BJ7

Miniature triple diode designed for detector and rectifier applications, including television DC-restorer service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 3
Base: 9AX
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 450 mA

Description

Triple-diode miniature tube for detector and rectifier applications.

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: 9AX
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

9AX - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN13K	C	K — Cathode Original EIA label preserved, manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AX
PIN23P	C	P — Plate (Anode) Original EIA label preserved, manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AX
PIN3IS	A	IS — Internal Screen Original EIA label preserved, manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AX
PIN4H	—	H — Heater Original EIA label preserved, manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AX
PIN5H	—	H — Heater Original EIA label preserved, manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AX
PIN62P	B	P — Plate (Anode) Original EIA label preserved, manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AX
PIN72K	B	K — Cathode Original EIA label preserved, manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AX
PIN81P	A	P — Plate (Anode) Original EIA label preserved, manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AX
PIN91K	A	K — Cathode Original EIA label preserved, manufacturer confirmation pending	Unverified EIA Base Connections, printed page 131, 9AX

Section ratings

3 physical sections, each with unique specifications.

Section 1

Diode

X-ray radiationInterelectrode capacitances

Max plate voltage: 330 V
Rectifier peak inverse voltage: 330 V
Rectifier nominal output current: 1 mA
Rectifier peak forward current: 10 mA
Rectifier forward voltage drop: 2.7 V
Rectifier max heater-cathode voltage: 330 V

Representative row for three identical DC-restorer diode sections; detector/restorer PIV and current data are preserved in parameters rather than rectifier-specific promoted fields.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Second physical diode section added for documented triple-diode construction.

Section 3

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Third physical diode section added for documented triple-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

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristic

Tube voltage drop
2.7 V
At 10 mA DC

Other

DC output current per plate maximum
1 mA
DCRestorer
Peak inverse voltage maximum
330 V
DCRestorer
Peak current per plate maximum
10 mA
DCRestorer

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

AverageCurrentAt40VDC
1 mA
EachPlate

Characteristic

VoltageDropAt10mA
2.7 V
EachSection

Data set 03

1966 Tung Sol Electronic Tubes 1 of 4

Published operating points and test conditions from this source.

SECTION 1

Diode

Capacitance

PLATE #
3 µµf
Capacitances | PLATE #1 TO CATHODE #1. HEATER & INTERNAL SHIELD 3.0 µµf
PLATE #
2.6 µµf
Capacitances | PLATE #2 TO CATHODE #2. HEATER & INTERNAL SHIELD 2.6 µµf
PLATE #} TO CATHODE #
2.6 µµf
Capacitances | PLATE #} TO CATHODE # 3. HEATER h INTERNAL SHIELD 2.6 µµf
CATHODE #
4 µµf
Capacitances | CATHODE #1 TO PLATE #1. HEATER g~ INTERNAL SHIELD 4.0 µµf
CATHODE #
3.8 µµf
Capacitances | CATHODE #2 TO PLATE #2. HEATER & INTERNAL SHIELD 3.8 µµf
CATHODE #} TO PLATE #}. HEATER & INTERNAL SHIELO
4 µµf
Capacitances | CATHODE #} TO PLATE #}. HEATER & INTERNAL SHIELO 4.0 µµf
PLATE #
0.055 µµf
Capacitances | PLATE #1 TO PLATE #2 0.055 µµf
PLATE #
0.036 µµf
Capacitances | PLATE #2 TO PLATE #} 0.036 µµf
PLATE #} TO PLATE #i
0.036 µµf
Capacitances | PLATE #} TO PLATE #i 0.036 µµf

Other

HEATER VOLTAGE
6.3 V
Maximum Ratings | HEATER VOLTAGE 6.3 voLTs
HEATER NEGATIVE WITH RESPECT TO CATHODE
330 V
Maximum Ratings | HEATER NEGATIVE WITH RESPECT TO CATHODE 330 voLTs
MAXIMUM PEAK INVERSE PLATE VOLTAGE
330 V
Maximum Ratings | MAXIMUM PEAK INVERSE PLATE VOLTAGE 330 voLTs
TUBE VOLTAGE DROP (EACH SECTION) Ib
10 mA
Maximum Ratings | TUBE VOLTAGE DROP (EACH SECTION) Ib = 10 MA. (DC) Q.7 VOLTS
TUBE VOLTAGE DROP (EACH SECTION) Ib
7 V
Maximum Ratings | TUBE VOLTAGE DROP (EACH SECTION) Ib = 10 MA. (DC) Q.7 VOLTS

Data set 04

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

Peak Inverse Plate Voltage
330 V
EachDiode
Peak Plate Current Per Plate
10 mA
EachDiode
DCOutputCurrentPerPlate
1 mA
EachDiode
HeaterCathodeVoltagePositive
100 V
EachDiode
HeaterCathodeVoltageNegative
330 V
EachDiode

Characteristic

Tube Voltage Drop
2.7 V
EachDiode; PlateCurrent=10mA

Capacitance

Plate To Cathode Heater Shield Capacitance
3 pF
Section1
Cathode To Plate Heater Shield Capacitance
4 pF
Section1
Plate To Cathode Heater Shield Capacitance
2.6 pF
Section2
Cathode To Plate Heater Shield Capacitance
3.8 pF
Section2
Plate To Cathode Heater Shield Capacitance
2.6 pF
Section3
Cathode To Plate Heater Shield Capacitance
4 pF
Section3

Data set 05

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristics

Voltage (AC or DC)
6.3 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
unit No.1, internal shield, and heater
3
Published datasheet value; multiple values represent separate source-table limits or conditions.
unit No.2, internal shield, and heater
2.6
Published datasheet value; multiple values represent separate source-table limits or conditions.
unit No.1, internal shield, and heater
4
Published datasheet value; multiple values represent separate source-table limits or conditions.
unit No.2, internal shield, and heater
3.6
Published datasheet value; multiple values represent separate source-table limits or conditions.
Plate of unit No.1 to plate of unit No.2
0.055
Published datasheet value; multiple values represent separate source-table limits or conditions.
Plate of unit No.2 to plate of unit No.3
0.036
Published datasheet value; multiple values represent separate source-table limits or conditions.
Pin 1 -Cathode of — published value 1
1
Published datasheet value; multiple values represent separate source-table limits or conditions.
Pin 1 -Cathode of — published value 2
6
Published datasheet value; multiple values represent separate source-table limits or conditions.
Pin 2 -Plate of — published value 1
2
Published datasheet value; multiple values represent separate source-table limits or conditions.
Pin 2 -Plate of — published value 2
7
Published datasheet value; multiple values represent separate source-table limits or conditions.
Pin 3 -Internal — published value 1
3
Published datasheet value; multiple values represent separate source-table limits or conditions.
Pin 3 -Internal — published value 2
8
Published datasheet value; multiple values represent separate source-table limits or conditions.
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
9
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.
Plate Current for plate volts = 2 7 — published value 1
2 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Plate Current for plate volts = 2 7 — published value 2
7 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Plate Current for plate volts = 2 7 — published value 3
10 V
Published datasheet value; multiple values represent separate source-table limits or conditions.

Other

PEAK INVERSE PLATE VOLTAGE
330 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
PEAK PLATE CURRENT
10 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
DC OUTPUT CURRENT
1 mA
Published datasheet value; multiple values represent separate source-table limits or conditions.
Heater negative with respect to cathode
330 V
Published datasheet value; multiple values represent separate source-table limits or conditions.
Heater positive with respect to cathode
100 V
Published datasheet value; multiple values represent separate source-table limits or conditions.