QB52000

Transmitting power tetrode designed for RF amplification, linear/SSB service, oscillation, modulation, broadcasting, or frequency multiplication.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: GIANT 5P
Socket code: -
Base pins: -
Nominal heater: 7.5 V / 22.6 A

Description

Directly heated power tetrode for AM and single-sideband amplifier service. The supplied Philips source was read for heater or filament data, capacitances, limiting ratings, and representative RF/television operating conditions, with variant-sheet cross-references preserved.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: GIANT 5P
Socket code: -
Base pins: -
Nominal heater voltage: 7.5 V
Nominal heater current: 22.6 A
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

GIANT 5P - 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

Transconductance: 0.01 S
Amplification factor: 6.1
Max plate voltage: 5500 V
Max screen voltage: 800 V
Max plate dissipation: 800 W
Max screen dissipation: 120 W
Max cathode current: 700 mA

Published transmitting-tube ratings and principal characteristics promoted; additional RF operating points retained as parameters.

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

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

Heater/filament voltage
7.5 V
Heater/filament current
22.6 A
Transconductance
10000 uS
Screen-grid amplification factor
6.1
Typical plate voltage
4000 V
Typical screen-grid voltage
600 V
Typical plate current
200 mA

Other

Maximum plate/anode voltage
5500 V
Maximum screen-grid voltage
800 V
Maximum plate/anode dissipation
800 W
Maximum screen-grid dissipation
120 W
Operating plate voltage
5000 V
ClassC;Telegraphy;30MHz
RF output power
2400 W
ClassC;Telegraphy;30MHz
Maximum anode input power
3500 W
ClassC

Capacitance

Plate/anode capacitance
9.5 pF
Control-grid capacitance
47.6 pF
Plate-grid capacitance
0.1 pF