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Power - Tetrode (NOT beam) (over 1000V 100W) ·Tetrode

YL1440

Forced-air-cooled metal-ceramic VHF power tetrode for television and broadcast transmitters, transposers, and modulation service. Its comparatively high amplification factor and roughly 1.5 kW plate dissipation provide useful gain in professional RF power stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
4.2 V / 53 A

Description

Forced-air-cooled metal-ceramic VHF power tetrode for television transmitters, broadcast, modulation, and transposer applications.

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
4.2 V
Nominal heater current
53 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

Tetrode

X-ray radiationInterelectrode capacitances
Transconductance
0.025 S
Amplification factor
16
Max plate voltage
4000 V
Max screen voltage
700 V
Max plate dissipation
1500 W
Max screen dissipation
50 W
Max grid dissipation
30 W
Max cathode current
1.5 A

VHF RF power tetrode

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

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Frequency f 175,

    25 MHz

    ClassAB

  • Anode voltage Va

    3 kv

    ClassAB

  • Output power in load w1

    1.55 kW

    ClassAB

  • Frequency f

    260 MHz

    ClassB

  • Anode voltage Va

    3.5 kv

    ClassB

  • Output power in load Wy

    2.4 kW

    ClassB

  • Frequency f

    175 to 225 MHz

    Transposer

  • Anode voltage Va

    2.5 kV

    Transposer

  • Output power in load Wy

    0.55 kW

    Transposer

  • Filament voltage Vg

    4.2 V

  • Filament current I

    53 A

  • Filament peak starting current 1fp max

    300 A

  • Waiting time Ty, min

    1 S

  • Absolute max. erve.ope temperature tenv max

    240 °c

  • Frequency f up to

    260 MHz

  • Anode voltage max

    4 kv

  • Grid no. 2 voltage max

    700 V

  • Anode current max

    1.2 A

  • Anode input power max

    4 KW

  • Anode dissipation max

    1.5 kW

  • Grid no. 2 dissipation max

    50 W

  • Grid no. 1 dissipation max

    30 W

  • Cathode current max

    1.5 A

  • Frequency up to

    260 MHz

  • Anode voltage

    3.5 kV

  • Anode current, no signal condition

    100 mA

  • Anode current

    980 mA

  • Grid no. 2 current

    70 mA

  • Grid no. 1 current

    120 mA

  • Anode input power

    3.43 KW

  • Anode dissipation

    0.9 kW

  • Output power in load

    2.4 kW

  • Driving power

    90 W

  • Anode dissipation W, max

    1.5 kw

  • Frequency of vision carrier f 175,

    25 MHz

  • Bandwidth (

    -1 dB

  • Frequency of vision carrier £ 35,

    25 MHz

  • Bandwidth ( [1]

    -1 dB

  • Bandwidth ( [2]

    6 MHz

  • Grid no. 2 voltage Vga 600 600

    600 V

  • Grid no. 1 voltage Vg1 -21 -20

    21 V

  • Anode current, no signal condition Ia 200 200

    200 mA

  • Anode current, black [1]

    1 a

  • Anode current, black [2]

    900 mA

  • Grid no. 2 current, black Ig9 black 45 40

    50 mA

  • lg1 black 80 50

    9 mA

  • Output power in load, sync £ sync 1170 670

    1500 W

  • black Wy black 700 400

    0 W

  • Driving power, sync War sync 83 42

    94 W

  • black Wdr black 46 24

    50 W

  • Frequency of vision carrier f

    83.25 MHz

  • Bandwidth ( [2]

    7 MHz

  • Anode voltage Va 2,5

    2 kV

  • Grid no. 2 voltage Ve 600

    600 V

  • Grid no. 1 voltage Vg

    ~21 -20 V

  • 200

    200 mA

  • Anode current, black I3 black 900

    610 mA

  • Grid no. 2 current, black g2 plack

    45 mA

  • g1 black

    45 mA

  • Output power in toad, sync W, sync

    670 W

  • Driving power, sync War sync

    39 W

  • black Wdr black

    2 W

  • Frequency f

    175 to 225 MHz

  • Bandwidth ( [2]

    8 MHz

  • Anode voltage vV,

    2.5 kV

  • Grid no. 2 voltage Vgz

    600 v

  • Anode current, no signal condition I,

    550 mA

  • Anode current 6) Ia

    730 mA

  • Grid no. 2 current 6) Ig2

    50 mA

  • Grid no. I current 6) Igy

    35 mA

  • Driving power, sync Wdr

    18 W

  • Output power in load, sync WI

    0.55 kW

  • Intermodulation products 7) d

    -52 dB

  • with superimposed a 4,

    43 MHz

  • 6) At ¢.w. output power = S5

    0 W

  • ") Three-tone test method (vision carrier [1]

    8 dB

  • ") Three-tone test method (vision carrier [2]

    -7 dB

  • 0 RN S

    0 S

  • 1 ' t

    1 S

  • (D)

    1 W

  • v ) I52

    600 mA

  • o ) ]

    400 mA

  • A1

    8 A

  • Tt . —

    1-3.5 A

  • i e Tl0

    6 A

  • T . ——

    3 A

  • >0 -t > i = [ T)

    2.5 A

  • O _

    200 mA

  • 2 LA

    15 A

  • —

    1 A

  • I45

    400 mA

  • Vga92

    600 V

  • W > L

    3 A

Characteristic

  • Anode voltage Va

    4 kV

  • Grid no. 2 voltage Vg2

    500 v

  • Anode current I

    400 mA

  • Transconductance S

    25 mA

Capacitance

  • Ct(a)

    24 pF

  • Nutput Ca(g1) 9 Caf)

    9 pF

  • Anode to grid no. 1 Cagi

    0.1 pF