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QB2250

Beam-power tetrode designed for both audio-frequency and RF power amplification in transmitting and high-power amplifier equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: Giant 7-pin
Socket code: GIANT7
Base pins: 7
Nominal heater: 10 V / 5 A

Description

Beam-power tetrode for AF or RF power amplification.

Socket description

Giant 7-contact transmitting-tube base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: Giant 7-pin
Socket code: GIANT7
Base pins: 7
Nominal heater voltage: 10 V
Nominal heater current: 5 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Giant 7-pin - 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

Transconductance: 0.00375 S
Amplification factor: 8.5
Max plate voltage: 2000 V
Max screen voltage: 400 V
Max plate dissipation: 100 W

Promoted where the locked schema directly matches published RF values; frequency/service-specific limits and operating conditions are retained as 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

1963 Philips Electron Tubes Handbook V4

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Maximum plate voltage
2000 V
RFPowerTube
Maximum screen voltage
400 V
RFPowerTube
Application
Beam-power tetrode for AF or RF power amplification.
SourceDescription
Service category
RF/AF power service as specified in source
RFPowerTube
Heater/filament voltage
10 V
RFPowerTube
Heater/filament current
5 A
RFPowerTube

Construction

Heating method
Direct
RFPowerTube
Device class
BeamPower
RFPowerTube

Capacitance

Plate capacitance
16.3 pF
RFPowerTube

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Heating : direct Ve
10 V
Heating : direct Ve = 10V