Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Power - Beam (NOT sweep) ·BeamPower

7403

Reliable hard-glass beam tetrode designed for pulse amplification, switching, and high-voltage regulator service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
OCTAL6
Base pins
6
Nominal heater
6.3 V / 1.7 A

Description

Reliable hard-glass beam tetrode for pulse, switching, and high-voltage regulator service.

Socket description

Octal 6-contact base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
OCTAL6
Base pins
6
Nominal heater voltage
6.3 V
Nominal heater current
1.7 A
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

Beam Power

X-ray radiationInterelectrode capacitances
Max plate voltage
4000 V
Max screen voltage
850 V
Max plate dissipation
40 W
Max screen dissipation
3.5 W
Max grid dissipation
0.5 W
Max cathode current
150 mA

Published ratings and characteristics promoted from the approved datasheet.

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

1965 Tung Sol Industrial Tubes

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Heater voltage

    6.3 V

  • Heater current

    1.7 A

  • Peak plate voltage including transient

    5000 V

    Pulse

  • Peak cathode current

    10 A

    Pulse

  • Maximum heater-cathode voltage

    500 V