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Voltage Pentode - Sharp Cutoff (single) ·Pentode

6EJ7

Sharp-cutoff very-high-transconductance pentode for fixed-gain IF amplification in color and monochrome television receivers.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9A0
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 450 mA

Description

Sharp-cutoff pentode used as a high-transconductance IF amplifier in color and black-and-white television receivers.

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: 9A0
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

9A0 - 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: 200000 Ω
Transconductance: 0.01 S
Amplification factor: 60
Max plate voltage: 300 V
Max screen voltage: 300 V
Max plate dissipation: 2.5 W
Max screen dissipation: 0.55 W
Max cathode current: 25 mA
Rectifier max heater-cathode voltage: 200 V
Rectifier warm-up time: 11 s

Published promoted fields populated from the printed semantic headings.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Heater Voltage.................. 3.4 4.4 6.3 Volts
6.3 V
Heater Voltage.................. 3.4 4.4 6.3 Volts
Heater Current. .. ... ........... 600 450 300 Ma
300 mA
Heater Current. .. ... ........... 600 450 300 Ma
Output: pto(h+k+g24+g34+1.8)................. 3 uuf
3 pF
Output: pto(h+k+g24+g34+1.8)................. 3 uuf
Grid No.3 Voltage. . .................coiviiiin... 0 Volts
0 V
Grid No.3 Voltage. . .................coiviiiin... 0 Volts
Grid No. 2 Voltage. . ............
2 V
Grid No. 2 Voltage. . ............
Grid No. 1 Voltage. .. .............ooiiiirinnn .. —-2.5 Voits
1 V
Grid No. 1 Voltage. .. .............ooiiiirinnn .. —-2.5 Voits
Plate Current. ............... ..ot .. 10 Ma
10 mA
Plate Current. ............... ..ot .. 10 Ma
Grid No. 2 Current. . ..., .. 4.1 Ma
4.1 mA
Grid No. 2 Current. . ..., .. 4.1 Ma
Transconductance. . . .............coouieuneneiniann.. 15,000 umhos
15 umhos
Transconductance. . . .............coouieuneneiniann.. 15,000 umhos
Plate Resistance (approx.)....................oou.n. 0.35 Megohm
0.35 Megohm
Plate Resistance (approx.)....................oou.n. 0.35 Megohm

Other

Plate Voltage with Ib =0Ma................... ... 550 Volts Max.
550 V
Plate Voltage with Ib =0Ma................... ... 550 Volts Max.
Grid No. 2 Voltage with [c2 = 0Ma................ 550 Volts Max.
550 V
Grid No. 2 Voltage with [c2 = 0Ma................ 550 Volts Max.
Grid No.2 Voltage. . . ............................. 250 Volts Max.
250 V
Grid No.2 Voltage. . . ............................. 250 Volts Max.
Plate Dissipation. ................................. 2.5 Watts Max.
2.5 W
Plate Dissipation. ................................. 2.5 Watts Max.
Grid No. 2 Dissipation. ............................ 0.9 Watts Max.
0.9 W
Grid No. 2 Dissipation. ............................ 0.9 Watts Max.
Cathode Current. .. ................ ... ............ 25 Ma Max.
25 mA
Cathode Current. .. ................ ... ............ 25 Ma Max.
Grid No. 1 Circuit Resistance....................... 1.0 Megohm Max.
1 Megohm
Grid No. 1 Circuit Resistance....................... 1.0 Megohm Max.

Data set 02

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Transconductance
10000 uS
Typical

Data set 03

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
200 V
IFAmplifier
Screen voltage
200 V
IFAmplifier
Control-grid voltage
-2.5 V
IFAmplifier
Plate current
10 mA
IFAmplifier
Screen current
4.1 mA
IFAmplifier

Characteristic

Plate resistance
350000 Ω
IFAmplifier
Transconductance
15000 µS
IFAmplifier
Amplification factor
60
IFAmplifier

Data set 04

1966 Tung Sol Electronic Tubes 2 of 4

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage
200 V
ClassA1;IF-Amplifier
Grid 2 voltage
200 V
ClassA1;IF-Amplifier
Grid 1 voltage
-2.5 V
ClassA1;IF-Amplifier
Plate current
10 mA
ClassA1;IF-Amplifier
Grid 2 current
4.1 mA
ClassA1;IF-Amplifier
Maximum no-current plate voltage
550 V
PlateCurrent=0

Characteristic

Grid-2-to-grid-1 amplification factor
60
ClassA1

Data set 05

1967 Mullard Receiving and Amplifying Valves

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Ci n
10 pF
Published in approved EF184 target datasheet entry; Section1
Co ut
3 pF
Published in approved EF184 target datasheet entry; Section1
Cg l - g 2
2.8 pF
Published in approved EF184 target datasheet entry; Section1
P g2 max
900 mW
Published in approved EF184 target datasheet entry; Section1
T b u l b max
180 °C
Published in approved EF184 target datasheet entry; Section1
gm =2
2 mA
Published in approved EF184 target datasheet entry; Section1

Data set 06

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater voltage
6.3 V
Heater current
300 mA
Plate voltage
200 V
ClassA
Screen voltage
200 V
ClassA
Grid voltage
-2.5 V
ClassA
Plate current
10 mA
ClassA
Screen current
4.1 mA
ClassA
Maximum plate voltage
250 V
Maximum screen voltage
250 V
Maximum cathode current
25 mA
Plate dissipation
2.5 W

Characteristic

Plate resistance
350000 ohm
ClassA
Transconductance
15000 uS
ClassA

Capacitance

Grid-to-plate capacitance
0.005 pF

Data set 07

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater Voltage (ac/dc) 3.4 4.4
6.3 V
Published in approved XF184 target datasheet entry; Section1
Heater Current 0.6 0.45
300 mA
Published in approved XF184 target datasheet entry; Section1
Plate Supply Voltage B
50 V
Published in approved XF184 target datasheet entry; Section1
Plate Voltage
250 V
Published in approved XF184 target datasheet entry; Section1
Grid-No.2 (Screen-Grid) Supply Voltage
550 V
Published in approved XF184 target datasheet entry; Section1
Grid-No.2 Voltage
250 V
Published in approved XF184 target datasheet entry; Section1
Cathode Current
25 mA
Published in approved XF184 target datasheet entry; Section1
Plate Dissipation
2.5 W
Published in approved XF184 target datasheet entry; Section1
Grid-No.2 Input
0.9 W
Published in approved XF184 target datasheet entry; Section1
Plate Voltage 190
200 V
Published in approved XF184 target datasheet entry; Section1
Grid-No.2 Voltage 190
200 V
Published in approved XF184 target datasheet entry; Section1
Grid-No. 1 Voltage —2.35
-2.5 V
Published in approved XF184 target datasheet entry; Section1
Grid-No.l-Circuit Resistance
1 MΩ
Published in approved XF184 target datasheet entry; Section1

Capacitance

Internal Shield
10 pF
Published in approved XF184 target datasheet entry; Section1
Internal Shield
3 pF
Published in approved XF184 target datasheet entry; Section1

Characteristic

Plate Resistance (Approx.) 0.35
0.35 MΩ
Published in approved XF184 target datasheet entry; Section1
Transconductance 15000
15000 µS
Published in approved XF184 target datasheet entry; Section1
Plate Current 10
10 mA
Published in approved XF184 target datasheet entry; Section1
Grid-No.2 Current 4.1
-4.1 mA
Published in approved XF184 target datasheet entry; Section1