Skip to main content

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

YL1520

Large forced-air-cooled metal-ceramic VHF tetrode for high-power television, AM/FM broadcast, transposer, and modulation service. High transconductance and approximately 18 kW plate dissipation support demanding professional transmitter output stages.

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

Description

Forced-air-cooled metal-ceramic VHF power tetrode for high-power television transmitters, AM/FM 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
11.5 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
0.06 S
Amplification factor
8.5
Max plate voltage
9500 V
Max screen voltage
1000 V
Max plate dissipation
18000 W
Max screen dissipation
100 W
Max grid dissipation
50 W
Max cathode current
9 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

  • Anode voltage Vi

    8 kV

    ClassAB

  • Output power in load Wy

    27.5 kW

    ClassAB

  • Anode voltage Vi,

    8.5 kV

    ClassC

  • Output power In load Wy

    25 kW

    ClassC

  • Frequency I

    175 to 225 MHz

    Transposer

  • Anode voltage Vi

    3 kV

    Transposer

  • Qutput power in load W

    10.5 kW

    Transposer

  • Filament current Iy

    120 A

  • Filament peak starting current pr max

    750 A

  • Waiting time Ty min

    1 s

  • Absolute max. envelope temperature teny Max

    240 °C

  • Recommended max. seal temperature t max

    200 °C

  • Frequency f

    260 MHz

  • Anode voltage Va

    9 kv

  • Grid no. 2 voltage Vg2

    1 kV

  • Grid no. 1 voltage Vg1

    500 V

  • Anode current, black Ia black

    7 A

  • Anode input power, black Wia plack

    40 kW

  • Anode dissipation Wy

    18 kW

  • Grid no. 2 dissipation Wgo

    100 W

  • Grid no. 1 dissipation Weq

    50 W

  • Cathode current Ik

    9 A

  • Frequency of vision carrier f

    175.25 MHz

  • Bandwidth ( [1]

    -1 dB

  • Bandwidth ( [2]

    7.5 MHz

  • Anode voltage Va

    8 kv

  • Grid no. 2 voltage Vgo

    700 V

  • Grid no. 1 voltage Vg1

    -84 v

  • Anode current, no-signal condition Iy

    900 mA

  • Anode current, black I3 plack

    3.9 A

  • Grid no. 2 current, black Ig2 black

    55 mA

  • Grid no. 1 current, black Ig1 plack

    180 mA

  • Output power in load, sync Wy sync

    27.5 W

  • black Wy black

    16.5 kW

  • Anode dissipation, black Wa black

    14 kW

  • Driving power, sync Wdrgync

    965 W

  • Differential gain

    285 %

  • Frequency of vision carrier f 83,25

    55.25 MHz

  • Bandwidth ( [2]

    7 MHz

  • Anode voltage Vg 6,5

    6.5 kV

  • Grid no. 2 voltage Vgg 700

    700 V

  • Grid no. 1 voltage Vgl -88

    ~88 V

  • Anode current, no signal condition Iy 900

    900 mA

  • Anode current, black 14 plack 4, 1

    4.5 A

  • Grid no. 2 current, black Ig hlack 55

    45 mA

  • Grid no.1 current, black Ig1 black 160

    175 mA

  • Output power in load. sync Wy svne 20

    20 kW

  • Anode dissipation, black Wa black 14,6

    17.2 kW

  • Driving power, sync Wdrgvne 835

    910 W

  • black Wdrpl ek 144

    520 W

  • with superimposed a 4,

    43 MHz

  • 7y Three-tone test method (vision carrier [1]

    -8 dB

  • 7y Three-tone test method (vision carrier [2]

    -7 dB

  • 6) At ¢.w, output power = 10,35 kKW, [1]

    -17 dB

  • 6) At ¢.w, output power = 10,35 kKW, [2]

    0 dB

  • Frequency f

    175 to 225 MHz

  • Bandwidth ( [2]

    8 MHz

  • Anode voltage Vi

    8 kV

  • Grid no. 2 voltage Voo

    200 V

  • Anode current, no signal condition Ia

    1.8 A

  • Anode current 6) Ia

    3.3 A

  • Grid no. 2 current 6) Ig2

    35 mA

  • Grid no. 1 current 6) Igl

    20 mA

  • Driving power, sync Wdr

    250 W

  • Output power in load, sync Wy

    10.5 kW

  • Intermodulation products 7) d

    -55 dB

  • Anode voltage Vi, max

    9.5 kV

  • Grid no. 1 voltage —Vgl max

    500 V

  • Anode current Iy max

    7 A

  • Anode input power Wia max

    42 kW

  • Anode dissipation W, max

    18 kW

  • Grid no. 2 dissipation \\'g,‘2 max

    100 W

  • Grid no. 1 dissipation ng max

    50 W

  • Cathode current Iy max

    9 A

  • Anode voltage Vy

    8.5 kV

  • Grid no. 2 voltage Vgz

    700 V

  • Grid no. 1 voltage Vg1

    ~106 V

  • Anode current, no signal condition 1,

    300 mA

  • Anode current 1

    4.6 A

  • Grid no. 2 current 1g2

    100 mA

  • Grid no. 1 current g

    325 mA

  • Anode input power Wig

    39.1 kW

  • Anode dissipation Wy

    14 kW

  • Output power in load Wy

    25 kW

  • Driving power War

    800 W

  • 1 WEASAA'EAY Ai2

    0 mA

  • AY XhY LAVEVEAV hY

    100 °C

  • ] ra \ AY

    25 s

  • ta= 130 OC—++120

    0 C

  • 14

    16 W

  • y \

    < 1 A

Characteristic

  • Grid no. 2 voltage \'gz

    700 V

  • Anode current I,

    2.4 A

  • Transconductance S

    60 mA

Capacitance

  • Input Cgl(a) 135 Cf(a)

    69 pF

  • Anode to filament Cat

    0.25 pF