AX9908

High-power transmitting tetrode designed for RF power amplification, linear amplification, oscillation, modulation, or frequency multiplication.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 10 V / 9.7 A

Description

AX9908 is listed in the supplied Amperex power-tube table as a transmitting power tetrode, with published filament, dissipation, operating, output-power, and frequency data.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 10 V
Nominal heater current: 9.7 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

Tetrode

X-ray radiationInterelectrode capacitances

Amplification factor: 9.5
Max plate voltage: 5000 V
Max screen voltage: 700 V
Max plate dissipation: 500 W

Electrical values extracted from the supplied source table; typical operating values are preserved 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

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

Filament voltage
10 V
Published transmitting-tube rating
Filament current
9.7 A
Published transmitting-tube rating
Amplification factor
9.5
Published power-tube table

Other

Maximum plate dissipation
500 W
Published power-tube table
Plate voltage
5000 V
TransmittingService
Plate current
452 mA
TransmittingService
Power output
1760 W
TransmittingService
Grid bias
-200 V
TransmittingService
Grid current
30 mA
TransmittingService
Screen voltage
700 V
TransmittingService
Maximum frequency
75 MHz
FullInputWatts