TBW620

Philips water-cooled coaxial power triode for AM, FM, and television transmitters. With about 12 kW dissipation and high transconductance, it provides strong current capability for professional broadcast RF stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 154 A

Description

TBW620 is a Philips water-cooled coaxial transmitting triode for AM, FM and television transmitters. 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: 6.3 V
Nominal heater current: 154 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: 1000 Ω
Transconductance: 0.06 S
Amplification factor: 60
Max plate voltage: 5500 V
Max plate dissipation: 12000 W
Max cathode current: 6 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
6.3 V
DirectlyHeated
Filament current
154 A
DirectlyHeated
Amplification factor
60
Published
Transconductance
60000 µS
Published

Other

Maximum plate voltage
5500 V
Published limit
Maximum plate dissipation
12000 W
Published limit
Maximum operating frequency
220 MHz
RFService
Maximum starting filament current
500 A
FilamentStarting
Plate voltage
5000 V
48-88 MHz
Plate voltage
4000 V
170-220 MHz
Plate input power
25 kW
48-88 MHz
Plate input power
22 kW
170-220 MHz
Plate dissipation
12 kW
Published cooling limit

Capacitance

Plate-to-cathode capacitance
0.6 pF
Published
Grid capacitance
65 pF
Published
Grid-to-plate capacitance
29 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
6.3 V
Heater/filament current
154 A
Transconductance
60000 uS
Amplification factor
60
Plate resistance
1000 ohm

Other

Maximum plate voltage
5500 V
Maximum plate dissipation
12000 W
Maximum cathode current
6 A
Operating plate voltage
5000 V
GroundedGrid;ClassC;110MHz
Operating plate current
4.8 A
GroundedGrid;ClassC;110MHz
Output power
15400 W
GroundedGrid;ClassC;110MHz
Maximum anode input power
30000 W

Capacitance

Plate/anode capacitance
0.6 pF
Grid capacitance
65 pF
Plate-grid capacitance
29 pF