TBW15125

Transmitting power triode intended for RF amplification, oscillator, modulation, or industrial generator service. Manufacturer documentation emphasizes professional radio-frequency operation and substantial power handling.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 17.5 V / 196 A

Description

TBW15125 is a Philips water-cooled very-high-power transmitting triode equivalent to TBW12100 except for filament energizing data. 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: 17.5 V
Nominal heater current: 196 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

Plate resistance: 270 Ω
Transconductance: 0.05 S
Amplification factor: 27
Max plate voltage: 15000 V
Max plate dissipation: 50000 W
Max cathode current: 12 A

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
17.5 V
DirectlyHeated
Filament current
196 A
DirectlyHeated
Amplification factor
27
Published
Transconductance
50000 µS
Published
Single-phase filament voltage
17.5 V
SinglePhaseFilament
Single-phase filament current
196 A
SinglePhaseFilament
Three-phase filament voltage
15.5 V
ThreePhaseFilament
Three-phase filament current
131 A
ThreePhaseFilament

Other

Maximum plate voltage
15000 V
Published limit
Maximum plate dissipation
50000 W
Published limit
Maximum plate/cathode current
12 A
Published limit
Maximum operating frequency
30 MHz
RFService
Single-phase maximum starting current
420 A
SinglePhaseFilament
Three-phase maximum starting current
280 A
ThreePhaseFilament
Plate voltage
12000 V
ClassC 15MHz
Plate current
12 A
ClassC 15MHz
Power output
108 kW
ClassC 15MHz

Capacitance

Plate-to-cathode capacitance
3.4 pF
Published
Grid capacitance
116 pF
Published
Grid-to-plate capacitance
86 pF
Published

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Heater/filament voltage
17.5 V
Heater/filament current
196 A
Transconductance
50000 uS
Amplification factor
27
Plate resistance
270 ohm
Three-phase filament voltage
15.5 V
ThreePhase
Three-phase filament current
131 A
ThreePhase
Single-phase filament voltage
17.5 V
SinglePhase
Single-phase filament current
196 A
SinglePhase

Other

Maximum plate voltage
15000 V
Maximum plate dissipation
50000 W
Maximum cathode current
12 A
Operating plate voltage
12000 V
ClassC;Telegraphy;15MHz
Operating plate current
12 A
ClassC;Telegraphy;15MHz
Output power
108000 W
ClassC;Telegraphy;15MHz