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

YL1420

Forced-air-cooled metal-ceramic VHF transmitting tetrode for television, AM/FM broadcast, transposer, and modulation service. Its directly heated cathode and multi-kilowatt plate dissipation support high-power professional broadcast RF and audio-frequency modulator stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 120 A

Description

Forced-air-cooled metal-ceramic VHF power tetrode for television transmitters, AM/FM broadcast, AF modulation, and transposer service.

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
120 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
0.03 S
Amplification factor
7.5
Max plate voltage
8500 V
Max screen voltage
1000 V
Max plate dissipation
6000 W
Max screen dissipation
80 W
Max grid dissipation
40 W
Max cathode current
4.5 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

    5 kV

    ClassAB

  • Qutput power in load W,

    8.6 kW

    ClassAB

  • Frequency f

    260 MHz

    ClassB

  • Anode voltage Vv,

    7 kv

    ClassB

  • Output power in load Wy

    10.5 kW

    ClassB

  • Frequency f

    260 MHz

    ClassC

  • Output power in load Wy

    11 kW

    ClassC

  • Frequency f

    175 to 225 MHz

    Transposer

  • Anode voltage Va

    4 kv

    Transposer

  • Output power in load w

    2.5 kW

    Transposer

  • Filament voltage Vi

    6.3 V

  • Filament current If

    120 A

  • Filament peak starting current Ity max

    750 A

  • Waiting time Ty min

    1 s

  • Frequency f up to

    260 MHz

  • Anode voltage Va max

    8.5 kv

  • Grid no. 2 voltage VgZ max

    1 kV

  • Anode input power Wia max

    18.5 kW

  • Anode dissipation W, max

    6 kW

  • Frequency f up to

    260 MHz

  • Grid no.2 current Ig2

    80 mA

  • Anode input power Wia

    15.4 kW

  • Anode dissipation W,

    4.3 kW

  • Output power in load Wy

    10.5 kW

  • Anode voltage Va max

    6.5 kV

  • Anode input power, black Wi black max

    12 kW

  • Grid no. 2 dissipation Wgz max

    80 W

  • Frequency of vision carrier f

    175.25 MHz

  • Bandwidth ( [1]

    -1 dB

  • Bandwidth ( [2]

    7 MHz

  • Frequency of vision carrier f 83,25

    55.25 MHz

  • Anode voltage Va 4

    4 kv

  • Grid no. 2 voltage Vgo 600

    600 V

  • Anode current, no signal condition Ia 750

    750 mA

  • Anode current, black Tapy 2,1

    2.3 A

  • Grid no. 2 current, black Ig2b1 45

    45 mA

  • Grid no.1 current, black Iglbl 75

    85 mA

  • Output power in load, sync Wy sync 6,25

    6.25 kW

  • black Wi plack 3,75

    3.75 kW

  • Driving power, sync War sync 340

    385 W

  • black Wdr plack 180

    210 W

  • Frequency f

    175 to 225 MHz

  • Bandwidth ( [2]

    8 MHz

  • Anode voltage Vg

    4 kv

  • Grid no. 2 voltage Vg2

    700 v

  • Grid no. 1 voltage 1y A%

    -65 A

  • Anode current, no signal condition lagl

    1 A

  • Anode current 1,

    1.65 A

  • Grid no. 2 current 6) Ig2

    25 mA

  • Grid no. 1 current 6) Igl

    10 mA

  • Driving power, sync War

    85 W

  • Output power in load, sync Wy

    2.5 kW

  • Intermodulation products ‘) d

    -52 dB

  • Frequency f upto

    260 MHz

    ClassC

  • Anode voltage Va max

    8.5 kV

  • Grid no. 2 voltage Vg2 max

    1 kV

  • Grid no. 1 voltage —Vgl max

    500 v

  • Anode current Iy max

    4 A

  • Anode input power Wig max

    18.5 kW

  • Grid no. 2 dissipation Wgz max

    80 w

  • Grid no. 1 dissipation ng max

    40 W

  • Cathode current Ik max

    4.5 A

  • Frequency f

    260 MHz

  • Anode voltage Va

    7 kV

  • Grid no. 2 voltage Vg2

    600 v

  • Grid no. 1 voltage Vg,

    -120 v

  • Anode current, no signal condition I

    200 mA

  • Anode current Iy

    2.3 A

  • Grid no. 2 current 1g2

    80 mA

  • Grid no. 1 current Ig1

    150 mA

  • Anode input power Wia 16,

    1 kW

  • Anode dissipation Wa

    5 kW

  • Output power in load Wy

    11 kW

  • Driving power War

    325 W

  • 3) Black signal including line sync pulses

    4 A

  • with superimposed a 4,

    43 MHz

  • ) At c.w. output power

    2.5 kW

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

    -8 dB

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

    7 dB

  • ti

    25 °C

  • Vg1 IgZ:O.QA

    300 mA

  • /. T 1gi [1]

    12 A

  • /. T 1gi [2]

    1 a

  • /. T 1gi [3]

    10 A

  • ~ A

    9 A

  • LS =o T1

    6 A

  • N "KL

    50 S

  • C ]

    300 mA

  • gt =—— ——

    100 mA

  • gt =—— ——

    5 A

  • T—

    1 A

  • Vg2

    700 V

  • W 12 [1]

    4 A

  • W 12 [2]

    300 mA

  • N .1&\ — Ig1=1

    2 A

Characteristic

  • Anode voltage Va

    5 kV

  • Transconductance S

    30 mA

Capacitance

  • Input Cf(a)

    48 pF

  • Output Ca(gl) 16 Ca(f) 16,

    4 pF