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

TB3750

Directly heated Philips transmitting triode for RF and AF power service. Rated for approximately 250 W plate dissipation and 3 kV plate voltage, with about 5 mS transconductance and amplification factor around 25.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B5F
Base pins
-
Nominal heater
5 V / 14.1 A

Description

TB3750 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
5 V
Nominal heater current
14.1 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
0.005 S
Amplification factor
25
Max plate voltage
3000 V
Max plate dissipation
250 W
Max cathode current
400 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

    5 V

    DirectlyHeated

  • Filament current

    14.1 A

    DirectlyHeated

  • Amplification factor

    25

    Published

  • Transconductance

    5000 µS

    Published

Other

  • Maximum plate voltage

    3000 V

    Published limit

  • Maximum plate dissipation

    250 W

    Published limit

  • Maximum cathode/plate current

    400 mA

    Published limit

  • Plate voltage

    3000 V

    ClassC

  • Grid bias

    -250 V

    ClassC

  • Plate current

    363 mA

    ClassC

  • Grid current

    69 mA

    ClassC

Capacitance

  • Plate capacitance

    0.16 pF

    Published

  • Grid capacitance

    6.3 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 V¥ 5V

    5 a

    Filament voltage V¥ 5V

  • Filament current I 141 A

    141 a

    Filament current I 141 A

  • The filament is designed to accept temporary fluctuations of +5% and —-10%

    -10 a

    The filament is designed to accept temporary fluctuations of +5% and —-10%

  • Anode to all other elements except grid Ca 0,16 pF

    160 mA

    Anode to all other elements except grid Ca 0,16 pF

  • Grid to all other elements except anode Cg 6,3 pF

    6.3 a

    Grid to all other elements except anode Cg 6,3 pF

  • Anode to grid Cag 5,0 pF

    5 A

    Anode to grid Cag 5,0 pF

  • Anode voltage Va 3 kv

    3 A

    Anode voltage Va 3 kv

  • Anode current la 90 mA

    90 A

    Anode current la 90 mA

  • Anode connector (clip) 40624 Net mass 190g

    190 A

    Anode connector (clip) 40624 Net mass 190g

  • RF power triode TB3/750

    750 w

    RF power triode TB3/750

  • Anode voltage 3 2.5 2 1.5

    1.5 A

    Anode voltage 3 2.5 2 1.5

  • Grid voltage

    120 v

    Grid voltage =350 -250 -200 -150 -~120

  • Anode current 380 363 400 400 400

    400 A

    Anode current 380 363 400 400 400

  • Driving power 40 27 23.5 23 21.5

    21.5 v

    Driving power 40 27 23.5 23 21.5

  • Anode input power 1520 1090 1000 800 600

    600 A

    Anode input power 1520 1090 1000 800 600

  • Anode dissipation 320 250 250 215 175

    175 A

    Anode dissipation 320 250 250 215 175

  • Fig. 2 Ground grid configuration

    2 nf

    Fig. 2 Ground grid configuration.

  • Frequency f

    100 MHz

    Frequency f = 100 100 100 100 MHz

  • Anode voltage V,

    1.5 A

    Anode voltage V, = 3 2.5 2 1.5 kV

  • Grid voltage Vg

    -120 v

    Grid voltage Vg = -250 -200 -150 -120 V

  • AC voltage Vgp

    295 A

    AC voltage Vgp = 430 380 320 295 V

  • Anode current I,

    800 A

    Anode current I, = 726 800 800 800 mA

  • Grid current Ig

    160 mA

    Grid current Ig = 138 138 160 160 mA

  • Driving power Wdar

    233 v

    Driving power Wdar = 310 294 250 233 W

  • Anode input power Wi,

    1200 A

    Anode input power Wi, = 2180 2000 1600 1200 W

  • Anode dissipation W,

    350 A

    Anode dissipation W, = 500 500 430 350 W

  • 1y power transferred from driving stage included

    1 w

    1y power transferred from driving stage included

  • RF power triode TB 3/750

    750 w

    RF power triode TB 3/750

  • Frequency f 100 100 MHz

    100 MHz

    Frequency f 100 100 MHz

  • Anode voltage Va 4 3 kV

    3 A

    Anode voltage Va 4 3 kV

  • Anode current I, 760 726 mA

    726 A

    Anode current I, 760 726 mA

  • Grid current Ig 160 138 mA

    138 mA

    Grid current Ig 160 138 mA

  • Grid resistor Rg 2200 1800 €

    1800 s

    Grid resistor Rg 2200 1800 €

  • Driving power War 80 54 W

    54 v

    Driving power War 80 54 W

  • Anode input power Wia 3040 2180 W

    2180 A

    Anode input power Wia 3040 2180 W

  • Anode dissipation w, 640 500 W

    500 A

    Anode dissipation w, 640 500 W

  • Frequency f upto 50 upto 100 upto 150 MHz

    150 MHz

    Frequency f upto 50 upto 100 upto 150 MHz

  • Frequency f

    50 MHz

    Frequency f = 50 50 MHz

  • Anode voltage vV,

    2.25 A

    Anode voltage vV, = 3.5 2.25 kV

  • Anode current I,

    340 A

    Anode current I, = 325 340 mA

  • Grid current Ig

    60 mA

    Grid current Ig = 65 60 mA

  • Grid resistor Rg

    3330 s

    Grid resistor Rg = 4500 3330 @

  • Anode input power Wia

    935 A

    Anode input power Wia = 1400 935 W

  • Anode dissipation Wy

    250 A

    Anode dissipation Wy = 300 250 W

Other

  • Amplification factor u 25

    25 A

    Amplification factor u 25

  • Bulb temperature Thulp Max. 350 °C

    350 a

    Bulb temperature Thulp Max. 350 °C

  • Anode seal temperature Ta max. 220 °C

    220 A

    Anode seal temperature Ta max. 220 °C

  • Pin temperature Tpin max. 180 °C

    180 a

    Pin temperature Tpin max. 180 °C

  • Anode voltage Va

    4 A

    Anode voltage Va = max 4

  • Anode input power Wi,

    1550 A

    Anode input power Wi, = max. 1550

  • Anode dissipation W,

    350 A

    Anode dissipation W, = max. 350

  • Negative grid voltage —Vg

    500 a

    Negative grid voltage —Vg = max. 500

  • Grid dissipation Wg

    40 s

    Grid dissipation Wg = max 40

  • Grid circuit resistance Rg

    100 s

    Grid circuit resistance Rg = max. 100

  • Cathode current I

    500 a

    Cathode current I = max. 500

  • Peak grid AC voltage 535 430 380 320 295

    295 a

    Peak grid AC voltage 535 430 380 320 295

  • Output power 1200 840 750 585 425

    425 w

    Output power 1200 840 750 585 425

  • Output power Wo

    1 w

    Output power Wo = 16804236 1500+247 1170+204 850+190 W 1)

  • Efficiency n

    71 %

    Efficiency n = 77 75 73 71 %

  • Output power W, 2320 1626 W

    1626 w

    Output power W, 2320 1626 W

  • Efficiency n 77 75 %

    75 %

    Efficiency n 77 75 %

  • Anode voltage V, - max. 3.8 max. 2.7 max. 1.8 kV

    1.8 A

    Anode voltage V, - max. 3.8 max. 2.7 max. 1.8 kV

  • Anode input power Wjs

    650 A

    Anode input power Wjs = max. 1500 max. 975 max. 650 W

  • Anode dissipation W,

    350 A

    Anode dissipation W, = max. 350 max. 350 max.350 W

  • Negative grid voltage -Vg

    500 a

    Negative grid voltage -Vg = max. 500 max.500 max.500 V

  • Grid dissipation Wg

    40 s

    Grid dissipation Wg = max. 40 max. 40 max. 40 W

  • Grid circuit resistance Ry

    100 s

    Grid circuit resistance Ry = max. 100 max. 100 max. 100 kQ

  • Cathode current I,

    450 a

    Cathode current I, = max. 450 max.450 max.450 mA

  • Output power W,

    685 w

    Output power W, = 1100 685 W

  • Efficiency n

    73 %

    Efficiency n = 78 73 %