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AX9308

Five-electrode power tube designed for RF power amplification, oscillation, and audio-frequency amplification. It uses a radiation-cooled anode and indirectly heated coated cathode for general power service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 12.6 V / 1.35 A

Description

Five-electrode tube designed for RF power amplification, oscillation, and audio-frequency amplification, with radiation-cooled anode and indirectly heated coated cathode.

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: 12.6 V
Nominal heater current: 1.35 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

Pentode

X-ray radiationInterelectrode capacitances

Max plate voltage: 1000 V
Max screen voltage: 300 V
Max plate dissipation: 45 W
Max cathode current: 1.5 A

Published promoted ratings/characteristics captured where applicable; additional source values preserved in parameter rows.

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

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Maximum frequency at full ratings
60 MHz
Maximum signal plate input
180 W
ClassB
Maximum signal screen-grid input
7 W
ClassB
Peak cathode current maximum
1.5 A