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Power - Triode (over 1000V 100W) ·Triode

TB25400

Directly heated Philips transmitting triode for RF and AF power service. Rated for approximately 150 W plate dissipation and 3 kV plate voltage, with manufacturer data covering high-power operating conditions and interelectrode capacitances.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B5F
Base pins
-
Nominal heater
6.3 V / 5.8 A

Description

TB25400 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

Giant 5-contact all-glass base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B5F
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
5.8 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
Max plate voltage
3000 V
Max plate dissipation
150 W
Max cathode current
255 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

    6.3 V

    DirectlyHeated

  • Filament current

    5.8 A

    DirectlyHeated

Other

  • Maximum plate voltage

    3000 V

    Published limit

  • Maximum plate dissipation

    150 W

    Published limit

  • Maximum cathode/plate current

    255 mA

    Published limit

  • Plate voltage

    2500 V

    ClassC Industrial

  • Grid bias

    -200 V

    ClassC Industrial

  • Plate current

    205 mA

    ClassC Industrial

  • Grid current

    40 mA

    ClassC Industrial

Capacitance

  • Plate capacitance

    0.1 pF

    Published

  • Grid capacitance

    4.9 pF

    Published

  • Grid-to-plate capacitance

    5 pF

    Published

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Filament voltage Vi

    6.3 a

    Filament voltage Vi = 6.3 V

  • Filament current If

    5.8 a

    Filament current If = 5.8 A

  • Anode to all other elements except grid Ca

    100 mA

    Anode to all other elements except grid Ca = 0.1 pF

  • Grid to all other elements except anode Cg

    4.9 a

    Grid to all other elements except anode Cg = 4.9 pF

  • Anode to grid Cag

    5 A

    Anode to grid Cag = 5.0 pF

  • Anode voltage Va

    2500 A

    Anode voltage Va = 2500 V

  • Anode current Iy

    60 A

    Anode current Iy = 60 mA

  • Anode connector 40624

    40624 A

    Anode connector 40624

  • RF power triode TB2.5/400

    400 w

    RF power triode TB2.5/400

  • Frequency 150 150 150 150 MHz

    150 MHz

    Frequency 150 150 150 150 MHz

  • Anode voltage 2500 2000 1500 1000 V

    1000 A

    Anode voltage 2500 2000 1500 1000 V

  • Grid voltage -200 -150 -110 -80 V

    -80 v

    Grid voltage -200 -150 -110 -80 V

  • Anode current 205 205 205 205 mA

    205 A

    Anode current 205 205 205 205 mA

  • Grid current 40 40 40 40 mA

    40 mA

    Grid current 40 40 40 40 mA

  • Grid input power 14 13 11 10 W

    10 w

    Grid input power 14 13 11 10 W

  • Anode input power 512 410 308 205 W

    205 A

    Anode input power 512 410 308 205 W

  • Anode dissipation 122 115 98 79 W

    79 A

    Anode dissipation 122 115 98 79 W

  • Frequency 150 150 150 MHz

    150 MHz

    Frequency 150 150 150 MHz

  • Anode voltage 2500 2000 1500 V

    1500 A

    Anode voltage 2500 2000 1500 V

  • Grid voltage -67 -45 Vv

    -45 v

    Grid voltage -67 -45 Vv

  • Anode current 97 120 mA

    120 A

    Anode current 97 120 mA

  • Anode input power 193 194 180 W

    180 A

    Anode input power 193 194 180 W

  • Anode dissipation 128 130 121 W

    121 A

    Anode dissipation 128 130 121 W

  • Grid current 28 52 mA

    52 mA

    Grid current 28 52 mA

  • Grid input power .1 9.4 W

    9.4 w

    Grid input power .1 9.4 W

  • Anode voltage Va 2000 1500 1000

    1000 A

    Anode voltage Va 2000 1500 1000

  • Grid voltage Vg ~225 -180 -130

    -130 v

    Grid voltage Vg ~225 -180 -130

  • Anode current I, 128 128 128

    128 A

    Anode current I, 128 128 128

  • Grid input power wig 15 14 12

    12 w

    Grid input power wig 15 14 12

  • Anode input power Wia 256 192 128

    128 A

    Anode input power Wia 256 192 128

  • Frequency { upto 150 MHz

    150 MHz

    Frequency { upto 150 MHz

  • Fig. 2 Grounded grid configuration

    2 nf

    Fig. 2 Grounded grid configuration.

  • Frequency £

    100 MHz

    Frequency £ = 100 100 100 100 MHz

  • Anode voltage Vo

    1000 A

    Anode voltage Vo = 2500 2000 1500 1000 V

  • Grid voltage Vg

    -80 v

    Grid voltage Vg = -200 -150 -110 -80 V

  • Anode current Ia

    410 A

    Anode current Ia = 410 410 410 410 mA

  • Grid current Ig

    80 mA

    Grid current Ig = 80 80 80 80 mA

  • Grid input power Wig

    100 w

    Grid input power Wig = 158 136 118 100 W

  • Anode input power Wia

    410 A

    Anode input power Wia = 1025 820 615 410 W

  • Anode dissipation W,

    158 A

    Anode dissipation W, = 245 230 195 158 W

  • 1) Power transferred from driving stage included

    1 w

    1) Power transferred from driving stage included

  • RF power triode TB2 .5/4 00

    0 w

    RF power triode TB2 .5/4 00

Other

  • Amplification factor

    25 A

    Amplification factor = 25

  • Temperature of anode seal

    220 a

    Temperature of anode seal = max. 220 °C

  • Bottom temperature

    180 a

    Bottom temperature = max. 180 °C

  • Peak grid AC voltage 390 340 300 260 V

    260 a

    Peak grid AC voltage 390 340 300 260 V

  • Output power 390 295 210 126 W

    126 w

    Output power 390 295 210 126 W

  • Efficiency 76 72 68 61.5 %

    61.5 %

    Efficiency 76 72 68 61.5 %

  • Anode voltage max. 3000 V

    3000 A

    Anode voltage max. 3000 V

  • Anode current max. 170 mA

    170 A

    Anode current max. 170 mA

  • Anode dissipation max. 150 W

    150 A

    Anode dissipation max. 150 W

  • Anode input power max. 200 W

    200 A

    Anode input power max. 200 W

  • Grid current max. 55 mA

    55 ma

    Grid current max. 55 mA

  • Grid circuit resistance with fixed grid bias max. 0.1 MQ

    0.1 s

    Grid circuit resistance with fixed grid bias max. 0.1 MQ

  • Grid circuit resistance with automatic grid bias max. 0.2 MQ

    0.2 s

    Grid circuit resistance with automatic grid bias max. 0.2 MQ

  • Peak grid AC voltage 100 100 100 VvV

    100 a

    Peak grid AC voltage 100 100 100 VvV

  • QOutput power 64 59 W

    59 w

    QOutput power 64 59 W

  • Efficiency 33 33 %

    33 %

    Efficiency 33 33 %

  • Peak grid AC voltage gp 415 370 320

    320 a

    Peak grid AC voltage gp 415 370 320

  • Anode voltage TSV,

    30000 A

    Anode voltage TSV, = max. 30000V T

  • Anode current Iy

    205 A

    Anode current Iy = max. 205 mA

  • Anode dissipation W,

    150 A

    Anode dissipation W, = max. 150 W

  • Anode input power Wija

    512 A

    Anode input power Wija = max. 512 W

  • Negative grid voltage -Vg

    300 a

    Negative grid voltage -Vg = max. 300 V

  • Grid current Ig

    45 ma

    Grid current Ig = max. 45 mA

  • Grid circuit resistance with fixed grid bias Rg

    0.1 s

    Grid circuit resistance with fixed grid bias Rg = max. 0.1 MR

  • Grid circuit resistance with automatic grid bias Rg

    0.2 s

    Grid circuit resistance with automatic grid bias Rg = max. 0.2 MQ

  • Peak grid A.C. voltage Vgp

    260 a

    Peak grid A.C. voltage Vgp = 390 340 300 260 V

  • Output power Wo

    1 w

    Output power Wo = 780+130 5904110 420496 252480 W 1)

  • Efficiency n

    61.5 %

    Efficiency n = 76 72 68 61.5 % 2)