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Power - Tetrode (NOT beam) (over 1000V 100W) ·Tetrode

8791V1

Cermolox VHF television-transmitter RF power tetrode designed for high-power linear amplification and peak-sync output service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
6.3 V / 7.5 A

Description

Cermolox VHF-TV RF power-amplifier tetrode rated for approximately 1 kW peak sync output.

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
7.5 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

Tetrode

X-ray radiationInterelectrode capacitances
Amplification factor
13
Max plate voltage
3000 V
Max screen voltage
750 V
Max plate dissipation
1000 W
Max cathode current
750 mA

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

Tetrode

Other

  • Heater/filament voltage

    6.3 V

  • Heater/filament current

    7.5 A

  • Maximum plate voltage

    3000 V

    VHF-TV

  • Maximum screen voltage

    750 V

    VHF-TV

  • Maximum plate current

    750 mA

  • Plate dissipation

    1000 W

  • Minimum heating time

    120 s

  • Full-input frequency

    400 MHz

Characteristic

  • Mu factor

    13

    GridSystem

Application

  • Application

    Grid-modulated Class C VHF-TV RF amplifier