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Power - Pentode Single (NOT beam) (under 10W) ·Pentode

EL803S

Special-quality long-life rugged EL803-family wideband power pentode for professional broadband amplifiers.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 640 mA

Description

Long-life rugged high-reliability wide-band power pentode with tight tolerances for professional broadband amplifiers.

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
-
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
640 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
100000 Ω
Transconductance
0.01 S
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
6.5 W
Max screen dissipation
1.5 W
Max cathode current
40 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

1953 AEG

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Typical Plate Voltage

    200 V

  • Typical Screen Voltage

    200 V

  • Typical Plate Current

    24 mA

  • Typical Screen Current

    4.7 mA

Capacitance

  • Input Capacitance

    10.4 pF

  • Output Capacitance

    8 pF

Data set 02

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Plate voltage

    200 V

  • Plate current nominal

    32 mA

  • Transconductance nominal

    10000 uS

  • Transconductance tolerance

    1800 uS

    PlusMinus

  • Plate resistance

    60000 Ohm

  • Screen-grid to control-grid amplification ratio

    22 ratio

Capacitance

  • Input capacitance

    10.4 pF

  • Output capacitance

    8 pF

  • Grid-to-plate capacitance maximum

    0.12 pF

Data set 03

195X Tesla

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • HeaterVoltageNominal

    6.3 V

    Nominal

  • HeaterCurrentNominal

    1 A

    Nominal

  • Maximum Plate Voltage

    800 V

  • Maximum Screen Voltage

    300 V

  • Maximum Plate Dissipation

    12 W

Characteristic

  • Transconductance

    12000 µS

    Typical

Data set 04

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

    650 mA

    Published heater current.

  • Plate current

    82 mA

    Published basic-parameter operating point.

  • Screen current

    4.7 mA

    Published basic-parameter operating point.

  • Transconductance

    10000 µS

    Published basic-parameter value; normalized to µS.

  • Plate resistance

    60000 Ω

    Published internal/plate resistance.

  • Amplification factor

    22

    Published amplification factor.

  • Input capacitance

    10.4 pF

    Published in the filename-designated tube entry.

  • Output capacitance

    8.9 pF

    Published in the filename-designated tube entry.

  • Grid-to-plate capacitance

    0.12 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

    40 mA

    Published limiting cathode-current value.

  • Maximum plate dissipation

    6.5 W

    Published limiting plate-dissipation value.

  • Maximum screen dissipation

    1.5 W

    Published limiting screen-dissipation value.