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Power - Beam (NOT sweep) (over 1000V 100W) ·BeamPower

8793

Forced-air Cermolox beam-power tube for multi-kilowatt RF service through about 400 MHz, supporting SSB, FM, and telegraphy transmitter operation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
5.7 V / 125 A

Description

Cermolox beam-power tube for high-power RF service through 400 MHz.

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
5.7 V
Nominal heater current
125 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
Amplification factor
10
Max plate voltage
7000 V
Max screen voltage
1500 V
Max plate dissipation
5000 W
Max cathode current
4 A

Published screen-to-control-grid mu factor promoted.

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

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Heater/filament voltage

    5.7 V

  • Heater/filament current

    125 A

  • Maximum plate voltage

    7000 V

  • Maximum screen voltage

    1500 V

  • Maximum plate current

    4 A

  • Plate dissipation

    5000 W

  • Minimum heating time

    15 s

  • Full-input frequency

    400 MHz

  • PEP output

    5000 W

    SSB

  • FM/telegraphy output

    10000 W

Characteristic

  • Grid No.2 to grid No.1 mu factor

    10

Construction

  • Cooling method

    Forced air