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TB4800

RF power transmitting triode for amplifier, oscillator, communications, broadcast, or industrial high-frequency generator service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: J4
Base pins: -
Nominal heater: 5 V / 10.5 A

Description

TB4800 is a Philips RF/AF transmitting triode. The supplied datasheet provides direct-filament data, RF/AF ratings, capacitances and high-power operating conditions.

Socket description

Jumbo 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: J4
Base pins: -
Nominal heater voltage: 5 V
Nominal heater current: 10.5 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

Triode

X-ray radiationInterelectrode capacitances

Amplification factor: 37
Max plate voltage: 4000 V
Max cathode current: 350 mA

Published filament, capacitance, typical characteristics, limiting values and RF/AF operating tables reviewed.

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

Triode

Characteristic

Filament voltage
5 V
DirectlyHeated
Filament current
10.5 A
DirectlyHeated
Amplification factor
37
Published

Other

Maximum plate voltage
4000 V
Published limit
Maximum cathode/plate current
350 mA
Published limit
Plate voltage
4000 V
ClassB
Grid bias
-220 V
ClassB
Plate current
313 mA
ClassB
Grid current
93 mA
ClassB

Capacitance

Plate capacitance
0.5 pF
Published
Grid capacitance
4.6 pF
Published
Grid-to-plate capacitance
2.9 pF
Published

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Capacitances Ca
0.5 a
Capacitances Ca = 0,5 pF