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Heptode ·Heptode

E91H

Special-quality dual-control heptode for professional gated-amplifier, mixing, modulation, and industrial control applications.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7G
Base pins
7
Nominal heater
6.3 V / 270 mA

Description

E91H is listed in the supplied Amperex material as a dual-control heptode for gated amplifier service. Published ratings and characteristics were captured from the supplied table.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B7G
Base pins
7
Nominal heater voltage
6.3 V
Nominal heater current
270 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

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

Heptode

X-ray radiationInterelectrode capacitances
Max plate voltage
250 V
Max plate dissipation
1 W
Max cathode current
20 mA

Promoted from clearly identified published ratings/characteristics; additional operating points, capacitances, detector data, microwave data, and special-quality limits are retained in TUBE_SECTION_PARAMETER.

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

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristic

  • Heater/filament voltage

    6.3 V

    Published rating

  • Heater/filament current

    270 mA

    Published rating

  • Control-grid cutoff voltage

    -10 V

    GatedAmplifier

Other

  • Plate voltage

    150 V

    GatedAmplifier

  • Plate current both controls at zero

    5.75 mA

    GatedAmplifier

Data set 02

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristic

  • Heater Voltage

    6.3 V

  • Heater Current

    270 mA

  • Application

    Computer gating valve

  • LongLifeDesign

    1 boolean

Data set 03

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristic

  • Heater voltage

    6.3 V

    Published rating

  • Heater current

    270 mA

    Published rating

  • Published characteristic value

    3.4

    GatedAmplifier

  • Published characteristic value 2

    7.6

    GatedAmplifier

  • Published characteristic value 3

    1

    GatedAmplifier

Other

  • Maximum plate voltage

    250 V

    GatedAmplifier

  • Control-grid voltage

    -100 V

    GatedAmplifier

Data set 04

1963 Philips Electron Tubes Handbook V1a

Published operating points and test conditions from this source.

SECTION 1

Heptode

Other

  • Plate voltage

    250 V

    Mixer

  • Screen-grid voltage

    60 V

    Mixer

  • Signal-grid voltage

    -5 V

    Mixer

  • Oscillator voltage

    10 V RMS

    Mixer;OscillatorDrive

  • Plate current

    3.3 mA

    Mixer

  • Oscillator-grid current

    530 µA

    Mixer

  • Screen-grid current

    6.5 mA

    Mixer

  • Peak cathode current maximum

    70 mA

    Section1

  • Grid-2/4 dissipation maximum

    1 W

    Section1

  • Grid-1 dissipation maximum

    0.5 W

    Section1

  • Grid-3 dissipation maximum

    0.5 W

    Section1

Characteristic

  • Conversion transconductance

    450 µS

    Mixer

  • Plate resistance

    0.65 MΩ

    Mixer

Data set 05

1963 Philips Electron Tubes Handbook V3

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristic

  • Heater voltage

    6.3 V

    Published heater rating

  • Heater current

    270 mA

    Published heater rating

Other

  • Plate supply voltage

    150 V

    GatedAmplifier

  • Screen supply voltage

    75 V

    GatedAmplifier

  • Control-grid voltage

    -10 V

    GatedAmplifier

Data set 06

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Heptode

Characteristic

  • alimentation parallele Ir =

    270 mA

    Published datasheet value

  • Ca =

    0.08 pF

    Published datasheet value

  • Cgi =

    0.45 pF

    Published datasheet value

  • Cg3 =

    0.2 pF

    Published datasheet value

  • Pour V¢ =

    6.3 V

    Published datasheet value

  • Bei Ve =

    6.3 V

    Published datasheet value

  • zu ¥

    14 mA

    Published datasheet value

  • Isolation Eka =

    120 V

    Published datasheet value

  • Vba =

    150 V

    Published datasheet value

  • Vo (

    5 V

    Published datasheet value

  • Vogi = ~

    1.5 V

    Published datasheet value

  • Vg3 =

    1.5 V

    Published datasheet value

  • Ra =

    20 kQ

    Published datasheet value

  • Rga,g4 =

    470 Q

    Published datasheet value

  • Igy = max

    0.2 pA

    Published datasheet value

  • Va =

    250 V

    Published datasheet value

  • Vgoigs =

    100 V

    Published datasheet value

  • Ia =

    3.3 mA

    Published datasheet value

  • Ig1 =

    530 pA

    Published datasheet value

  • Ig2+gd =

    6.5 mA

    Published datasheet value

  • Sc =

    450 pA

    Published datasheet value

  • Ri =

    0.85 MQ

    Published datasheet value

  • Vao = max

    1 W

    Published datasheet value

  • Va = max

    250 V

    Published datasheet value

  • V(g2+g4)o = max

    0.5 W

    Published datasheet value

  • Vg2+g4 = max

    0.5 W

    Published datasheet value

  • ~Vg3 = max

    20 mA

    Published datasheet value

  • +Vg3 = max. OV Ixp = max

    70 mA

    Published datasheet value

  • Veg3p = max

    120 V

    Published datasheet value

  • +Vg3p = max

    0.5 MQ

    Published datasheet value

  • ~Vgi = max

    100 V

    Published datasheet value

  • +Vgi = max. OV Rg3 = max

    0.5 MQ

    Published datasheet value

  • B3 = max

    0 V

    Published datasheet value

  • sQ PHILIPS E9

    1 h

    Published datasheet value

  • Vo =

    150 V

    Published datasheet value

  • Vg1=

    0 V

    Published datasheet value

  • SQ PHILIPS (E9

    1 h

    Published datasheet value