TBL620

Forced-air-cooled coaxial Philips power triode designed specifically for AM, FM, and television transmitters. Rated for approximately 10 kW plate dissipation and 5.5 kV plate voltage for high-power broadcast RF service.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

TBL620 is a Philips forced-air-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

Transconductance: 0.06 S
Amplification factor: 60
Max plate voltage: 5500 V
Max plate dissipation: 10000 W

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
10000 W
Published limit
Maximum operating frequency
220 MHz
RFService
Plate voltage
5000 V
48-88 MHz
Plate voltage
4000 V
170-220 MHz
Plate input power
24 kW
110 MHz
Plate dissipation
9 kW
110 MHz
Power output
15 kW
110 MHz

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

Other

Anode voltage
4000 V
Anode current
1.4 A
Transconductance
60000 µS
Amplification factor
60
Anode capacitance
0.6 pF
Grid capacitance
65 pF
Anode-grid capacitance
29 pF
Maximum anode voltage
5500 V
Maximum anode dissipation
10000 W