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EF184

Frame-grid high-transconductance pentode designed for wideband and television IF amplification. Its specialized grid construction provides high gain and bandwidth for demanding television and broadband signal stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: B9A
Socket code: B9A
Base pins: 9
Nominal heater: 6.3 V / 300 mA

Description

Frame-grid high-transconductance pentode for wideband and television IF amplification.

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: B9A
Socket code: B9A
Base pins: 9
Nominal heater voltage: 6.3 V
Nominal heater current: 300 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

B9A - 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: 380000 Ω
Transconductance: 0.015 S
Amplification factor: 60
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 2.5 W
Max screen dissipation: 0.9 W
Max cathode current: 25 mA

Promoted ratings and characteristics are taken from the printed target-tube entry in the approved PDF.

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

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 02

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Heater voltage
6.3 V
Published heater rating
Heater current
300 mA
Published heater rating
Transconductance
15000 µS
IFAmplifier
Plate resistance
380000 ohm
IFAmplifier

Other

Plate voltage
200 V
IFAmplifier
Screen voltage
200 V
IFAmplifier
Grid bias
-2.5 V
IFAmplifier
Plate current
10 mA
IFAmplifier
Screen current
4.1 mA
IFAmplifier

Data set 03

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 04

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
2.5 W
Maximum Screen Dissipation
0.6 W
Maximum Cathode Current
30 mA

Characteristic

Transconductance
15600 µS
Typical
Plate Resistance
250000 ohm
Typical

Data set 05

1972 Philips Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

HeaterVoltageNominal
6.3 V
Nominal
HeaterCurrentNominal
300 mA
Nominal
Maximum Plate Voltage
300 V
Maximum Screen Voltage
300 V
Maximum Plate Dissipation
2.5 W
Maximum Screen Dissipation
0.9 W
Maximum Cathode Current
30 mA

Characteristic

Transconductance
15600 µS
Typical
Plate Resistance
250000 ohm
Typical

Data set 06

1973 Mazda Valves Binder 2

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Heater Voltage Vh
63 V
Heater Current Ih
3 A
Maximum Anode Dissipation pa(max)
25 W
Maximum Screen Grid Dissipation pS2(max)
9 W
Maximum Anode Supply Voltage Va(b)max
550 V
Maximum Anode Voltage Va(max)
250 V
Maximum Screen Grid Supply Voltage Vg2(b)max
550 V
Maximum Screen Grid Voltage Vg2(max)
250 V
Maximum Peak Negative Grid Voltage —vgl (pk)max
50 V
Maximum Heater to Cathode Voltage (R.M.S.) Vh-k(max)r.m.s
150 V
Maximum Cathode Current Ik(max)
25 mA

Characteristic

Input cmn 10 104
115 pF
Output tout 30 34
4.5 pF
Anode to Grid 1 Ca-gl <00055 <00065 <
75 pF
Grid 1 to Grid 2 cgl-g2 28 28
28 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

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

Data set 08

1981 Russian Tubes Katsnelson and Larionov

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

Heater voltage
6.3 V
Published nominal/basic-parameter heater condition.
Heater current
300 mA
Published heater current.
Plate current
10 mA
Published basic-parameter operating point.
Screen current
4.1 mA
Published basic-parameter operating point.
Transconductance
15000 µS
Published basic-parameter value; normalized to µS.
Plate resistance
380000 Ω
Published internal/plate resistance.
Amplification factor
60
Published amplification factor.
Input capacitance
10 pF
Published in the filename-designated tube entry.
Output capacitance
3 pF
Published in the filename-designated tube entry.
Grid-to-plate capacitance
0.0055 pF
Published in the filename-designated tube entry.

Other

Maximum plate voltage
250 V
Published limiting operating value.
Maximum screen voltage
250 V
Published limiting operating value.
Maximum cathode current
25 mA
Published limiting cathode-current value.
Maximum plate dissipation
2.5 W
Published limiting plate-dissipation value.
Maximum screen dissipation
0.9 W
Published limiting screen-dissipation value.

Data set 09

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Heater voltage
6.3 V
Heater current
300 mA
Typical plate voltage
200 V
Typical screen voltage
200 V
Typical grid voltage
-2.5 V
Typical plate current
10 mA
Typical screen current
4.1 mA
Transconductance
15000 uS
Plate resistance
380000 ohm
Equivalent noise resistance at 40 MHz
330 ohm
Amplification factor
60

Capacitance

Grid input capacitance
10 pF
Plate output capacitance
3 pF
Plate-grid capacitance maximum
0.0055 pF