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Power - Tetrode (NOT beam) ·Tetrode

F2A

Indirectly heated power tetrode designed for output amplifiers, with published tetrode- and triode-connected operating and capacitance data. Suitable for substantial low-frequency power service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
G9K
Base pins
9
Nominal heater
6.3 V / 2 A

Description

Indirectly heated power tetrode for output amplifiers, with published tetrode- and triode-connected capacitance and operating data.

Socket description

EU-Telephone 9-pin, Siemens

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
G9K
Base pins
9
Nominal heater voltage
6.3 V
Nominal heater current
2 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
Plate resistance
2500 Ω
Max plate voltage
425 V
Max screen voltage
425 V
Max plate dissipation
30 W
Max screen dissipation
5 W
Max cathode current
140 mA

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

1963 Siemens

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Capacitance

  • Input capacitance

    20.5 pF

    TetrodeConnection

  • Output capacitance

    13 pF

    TetrodeConnection

  • Grid-to-plate capacitance

    0.45 pF

    TetrodeConnection

Characteristics

  • Triode-connected plate resistance

    1 kOhm

    TriodeConnection