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Voltage Pentode ·Pentode

E280F

Special-quality high-slope pentode for wide-band amplifier service requiring stable characteristics and long life. Manufacturer documentation emphasizes professional broadband amplification with extended operating reliability.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9EQ
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 315 mA

Description

Special-quality high-slope pentode for wide-band amplifier service requiring stable characteristics and long life.

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

9EQ - Terminal pinout

Electrical assignments shared by every tube using this base designation.

TerminalSectionConnectionEvidence
PIN1Base Pin—K — Cathode

Original chart label: K; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9EQ

PIN2Base Pin—G1 — Control Grid

Original chart label: G1; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9EQ

PIN3Base Pin—K — Cathode

Original chart label: K; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9EQ

PIN4Base Pin—H — Heater

Original chart label: H; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9EQ

PIN5Base Pin—H — Heater

Original chart label: H; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9EQ

PIN6Base Pin—IC

Original chart label: IC; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9EQ

PIN7Base Pin—P — Plate (Anode)

Original chart label: P; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9EQ

PIN8Base Pin—G3 — Suppressor GridGroup 9EQ8

Original chart label: G3; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9EQ

PIN8Base Pin—IS — Internal ScreenGroup 9EQ8

Original chart label: IS; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9EQ

PIN9Base Pin—G2 — Screen Grid

Original chart label: G2; manufacturer verification pending

Unverified

EIA Base Connections, printed page 132, 9EQ

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
100000 Ω
Transconductance
0.026 S
Max plate voltage
220 V
Max screen voltage
180 V
Max plate dissipation
4 W
Max screen dissipation
1.1 W
Max cathode current
30 mA
Rectifier warm-up time
120 s

Pentode-mode values promoted; triode-connected characteristics retained as parameters.

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

1960 CBS Hytron

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

  • Input capacitance

    9.3 pF

  • Output capacitance

    2.1 pF

  • Grid-to-plate capacitance

    0.035 pF

Other

  • Plate supply voltage

    190 V

    PentodeConnection

Characteristics

  • Plate current

    20 mA

    PentodeConnection

  • Screen-grid current

    6 mA

    PentodeConnection

  • Transconductance

    26000 uS

    PentodeConnection

  • Plate resistance

    100 kOhm

    PentodeConnection

  • Plate current

    24.5 mA

    TriodeConnection

  • Transconductance

    33000 uS

    TriodeConnection

  • Plate resistance

    1800 Ohm

    TriodeConnection

  • Amplification factor

    60 ratio

    TriodeConnection

Data set 02

1963 Siemens

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • Typical Plate Voltage

    190 V

    PentodeConnection

  • Typical Screen Voltage

    160 V

    PentodeConnection

  • Typical Plate Current

    20 mA

    PentodeConnection

Data set 03

1967 Mullard Receiving Tubes for Maintenance

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • I"

    315 mA

    Published in approved E280F.pdf target datasheet; Section1

  • Mutual co nductance 26 22 to 30 > 17

    5 mA

    Published in approved E280F.pdf target datasheet; Section1

Other

  • Th e ma x imum va r iat ion of he at e r current at V" = 6.3 V is

    16 mA

    Published in approved E280F.pdf target datasheet; Section1

  • ( in 8.3 9.3 10

    3 pF

    Published in approved E280F.pdf target datasheet; Section1

  • Ci h '" I (lk =

    26 mA

    Published in approved E280F.pdf target datasheet; Section1

  • Ci h '" I (lk = 26mA)

    15.5 pF

    Published in approved E280F.pdf target datasheet; Section1

  • 2.3 2.6

    2.9 pF

    Published in approved E280F.pdf target datasheet; Section1

  • Ca ~ e l

    0.03 pF

    Published in approved E280F.pdf target datasheet; Section1

  • ( ill 8.4 9.4

    1004 pF

    Published in approved E280F.pdf target datasheet; Section1

  • Ci ,, '" I (Ik =

    26 mA

    Published in approved E280F.pdf target datasheet; Section1

  • Ci ,, '" I (Ik = 26mA) 1

    5.6 pF

    Published in approved E280F.pdf target datasheet; Section1

  • COllI 3.2 3.6

    4 pF

    Published in approved E280F.pdf target datasheet; Section1

  • V,~ 150 V la

    24.5 mA

    Published in approved E280F.pdf target datasheet; Section1

  • V' I -1 .6 V gJU

    33 mA

    Published in approved E280F.pdf target datasheet; Section1

  • I"

    20 mA

    Published in approved E280F.pdf target datasheet; Section1

  • I,~

    6 mA

    Published in approved E280F.pdf target datasheet; Section1

  • gill

    26 mA

    Published in approved E280F.pdf target datasheet; Section1

  • gm 26 23 19 22

    20 mA

    Published in approved E280F.pdf target datasheet; Section1

  • *rgl (f =

    100 MHz

    Published in approved E280F.pdf target datasheet; Section1

  • j<:j; Cin (w ) 15.5 15 14.3 14.8

    14.8 pF

    Published in approved E280F.pdf target datasheet; Section1

  • tGB 180 162 138 156

    142 MHz

    Published in approved E280F.pdf target datasheet; Section1

  • I"! max

    5 mA

    Published in approved E280F.pdf target datasheet; Section1

  • i, max

    30 mA

    Published in approved E280F.pdf target datasheet; Section1

  • Thul b ma x

    180 °C

    Published in approved E280F.pdf target datasheet; Section1

Data set 04

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Heater voltage Vi

    6.3 V

    Heating

  • Heater current I¢

    315 mA

    Heating

  • Anode current Ia

    20 mA

    Heating

  • Transconductance S

    26 mA

    Heating

  • Heater current I

    299 to 331 mA

    Characteristics

  • Anode voltage Vao max

    400 V

    Limiting Values

  • Anode dissipation W, max

    4 W

    Limiting Values

  • Grid No.2 voltage Vgzo max

    2 V

    Limiting Values

  • Grid No.2 dissipation Wg2 max

    2 W

    Limiting Values

  • Cathode current Ix max

    30 mA

    Limiting Values

  • Grid No.l current Ig1 max. S mA

    1 mA

    Limiting Values

  • Grid No.1 voltage negative —Vgl max

    1 V

    Limiting Values

  • Grid No.l resistor Rgl max

    0.5 MΩ

    Limiting Values

  • cathode positive Vkf(k pos) max

    120 V

    Limiting Values

  • cathode negative Vif (k neg) max

    60 V

    Limiting Values

  • Heater voltage: The average heater voltage should be

    6.3 V

    Limiting Values

  • Anode supply voltage Vba

    190 V

    Operating Characteristics

  • Grid No.3 voltage Vg3

    3 v

    Operating Characteristics

  • Grid No.2 supply voltage Vbg2

    2 V

    Operating Characteristics

  • Grid No.l supply voltage +Vbgl

    8 V

    Operating Characteristics

  • Anode current I

    20 mA

    Operating Characteristics

  • Grid No.2 current Ig2

    2 mA

    Operating Characteristics

  • Mutual conductance S

    26 mA

    Operating Characteristics

  • Internal resistance R

    100 kΩ

    Operating Characteristics

  • resistance Req

    220 Ω

    Operating Characteristics

  • Frequency =

    100 MHz

    Operating Characteristics

  • Maximum plate voltage

    400 V

    Promoted published datasheet value

  • Maximum screen voltage

    400 V

    Promoted published datasheet value

  • Maximum plate dissipation

    4 W

    Promoted published datasheet value

  • Maximum screen dissipation

    1.1 W

    Promoted published datasheet value

Characteristic

  • Anode supply voltage Vba

    190 A

    Characteristics

  • Grid No.2 supply voltage Vbg2

    2 A

    Characteristics

  • Grid No.1 supply voltage +Vbgl

    1 v

    Characteristics

  • Cathode resistor Ry

    370 Ω

    Characteristics

  • Anode current I

    18.8 to 21.2 mA

    Characteristics

  • Grid No.2 current Ig2

    5.3 to 6.7 mA

    Characteristics

  • Mutual conductance S

    22 to 30 mA

    Characteristics

  • Frequency

    100 MHz

    Characteristics

  • Anode supply voltage Vba

    180 v

    Characteristics

  • Grid No.3 voltage Vg3

    3 A

    Characteristics

  • Cathode resistor Rk

    80 Ω

    Characteristics

  • Anode current I,

    17 mA

    Characteristics

  • Mutual conductance S

    24.5 mA

    Characteristics

  • Anode supply voltage V,

    160 V

    Characteristics

  • Grid No.1 supply voltage +Vbgl

    1 V

    Characteristics

  • Anode current I,

    24 mA

    Characteristics

  • Mutual conductance S

    33 mA

    Characteristics

  • Plate resistance

    100 Ω

    Promoted published datasheet value

  • Transconductance

    26000 µS

    Promoted published datasheet value

  • Amplification factor

    60

    Promoted published datasheet value

Capacitance

  • heater and screen cgl/gZgSkfs

    318.3 to 10.3 pF

    Capacitances

  • heater and screen Ca/gZgSkfs

    12.3 to 2.9 pF

    Capacitances

  • Anode to grid No.1 Cagl max

    1 mpF

    Capacitances

  • heater and screen Cgl/gZgSkfs

    15.5 pF

    Capacitances