TBL2400

Forced-air-cooled ceramic coaxial UHF power triode for RF amplification, oscillation, and frequency multiplication. Rated for approximately 400 W plate dissipation and 2.2 kV plate voltage for high-frequency transmitting service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 3.4 V / 19 A

Description

TBL2400 is a Philips forced-air-cooled ceramic-envelope coaxial UHF transmitting triode for RF amplification, oscillation and frequency multiplication. Its datasheet specifies direct-filament operation, RF power ratings, cooling requirements, capacitances and representative operating conditions.

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: 3.4 V
Nominal heater current: 19 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

Transconductance: 0.01 S
Amplification factor: 33
Max plate voltage: 2200 V
Max plate dissipation: 400 W
Max cathode current: 400 mA

Published filament data, capacitances, typical characteristics, limiting values and RF operating conditions 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
3.4 V
DirectlyHeated
Filament current
19 A
DirectlyHeated
Amplification factor
33
Published
Alternate filament voltage
3.3 V
600-750 MHz
Alternate filament voltage
3.2 V
750-900 MHz

Other

Maximum plate voltage
2200 V
Published limit
Maximum plate dissipation
400 W
Published limit
Maximum plate/cathode current
400 mA
Published limit
Maximum operating frequency
900 MHz
RFService
Plate voltage
2000 V
UHF
Plate current
200 mA
UHF
Plate input power
800 W
470 MHz
Plate dissipation
290 W
470 MHz

Capacitance

Plate-to-cathode capacitance
0.12 pF
Published

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Anode voltage
2000 V
Anode current
200 mA
Transconductance
10000 µS
Amplification factor
33
Anode capacitance
0.12 pF
Grid capacitance
11.5 pF
Anode-grid capacitance
6.5 pF
Maximum anode voltage
2200 V
Maximum anode dissipation
400 W