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Power - TV Vertical Output ·Pentode

EL805

Pulse-oriented power pentode specifically designed for television vertical-deflection output stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 760 mA

Description

Power pentode specifically designed for vertical deflection output stages in 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
-
Socket code
B9A
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
760 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
Max plate voltage
300 V
Max screen voltage
250 V
Max plate dissipation
10.5 W
Max screen dissipation
2 W
Max cathode current
75 mA

Promoted values come from the supplied datasheet; additional ratings, characteristics, and operating points 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

1959 Telefunken

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Plate voltage

    50 V

    Dynamic;Point1

  • Screen-grid voltage

    170 V

    Dynamic;Point1

  • Peak plate current

    200 mA

    Dynamic;Pulse

  • Peak screen-grid current

    35 mA

    Dynamic;Pulse

  • Plate voltage

    65 V

    Dynamic;Point2

  • Screen-grid voltage

    210 V

    Dynamic;Point2

  • Peak plate current

    285 mA

    Dynamic;Pulse

  • Peak screen-grid current

    45 mA

    Dynamic;Pulse

Other

  • Peak plate voltage

    2000 V

    PulseDuration<=0.8ms;Duty<=4%

  • Plate cold voltage

    550 V

  • Screen-grid cold voltage

    550 V

Capacitance

  • Grid-to-plate capacitance maximum

    1.25 pF