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Power - Tetrode (NOT beam) ·Tetrode

TH290

Coaxial transmitting tetrode usable as a continuous-wave oscillator or grounded-grid RF power amplifier, particularly suited to broadband television transmitter service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

The TH290 is a coaxial transmitting tetrode usable as a continuous-wave oscillator or grounded-grid RF power amplifier and is particularly suited to broadband television transmitters.

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
-
Nominal heater current
-
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

No fixed ratings are recorded for this section.

Published electrical data audited and retained in parameter table.

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

1972 Thomson CSF

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • MHz. The anode can dissipat e

    12 MHz

    MHz. The anode can dissipat e 12 kW.

  • TH

    290 W

    TH 290 tetrode is well adapted as a R.F. power

  • Heater voltage ( [1]

    1 V

    Heater voltage (1) - (2) .. .. ..o A

  • Heater voltage ( [2]

    2 V

    Heater voltage (1) - (2) .. .. ..o A

  • output (@

    2

    -output (@2tied t0gl) ... pF

  • Maximum temperature (

    8

    Maximum temperature (8) ... .ovvveremen oo

  • ( [1]

    1 V

    (1) - For heater voltage application, see note page 4,

  • ( [2]

    4 V

    (1) - For heater voltage application, see note page 4,

  • (

    2

    (2) In high frequency operation, the cathode is subjected to

  • ( [1]

    3 kW

    (3) 30 °C incoming air temperature 12 kW anode

  • ( [2]

    30 kW

    (3) 30 °C incoming air temperature 12 kW anode

  • ( [3]

    12 kW

    (3) 30 °C incoming air temperature 12 kW anode

  • D.C.anode voltage [1]

    5.2 W

    D.C.anode voltage .......... 5.2 Anode dissipation . . . . ........ 12

  • D.C.anode voltage [2]

    12 W

    D.C.anode voltage .......... 5.2 Anode dissipation . . . . ........ 12

  • D.C.gridg2 voltage [1]

    400 W

    D.C.gridg2 voltage .......... 400 >><<< Grid g2 dissipation 150

  • D.C.gridg2 voltage [2]

    150 W

    D.C.gridg2 voltage .......... 400 >><<< Grid g2 dissipation 150

  • D.C.gridgl voltage [1]

    250 W

    D.C.gridgl voltage .......... - 250 Grid g1 dissipation 50

  • D.C.gridgl voltage [2]

    50 W

    D.C.gridgl voltage .......... - 250 Grid g1 dissipation 50

  • Peak cathode current [1]

    25 A

    Peak cathode current . ....... 25 Frequency 1000

  • Peak cathode current [2]

    1000 A

    Peak cathode current . ....... 25 Frequency 1000

  • D.C.anodecurrent

    6 A

    D.C.anodecurrent .......... 6

  • Frequency [1]

    860 MHz

    Frequency ....-........... 860 MHz D.C. anode current 4.8

  • Frequency [2]

    4.8 MHz

    Frequency ....-........... 860 MHz D.C. anode current 4.8

  • Bandwidth [1]

    10 MHz

    Bandwidth ................ 10 MHz D.C. grid g2 current 50 mA

  • Bandwidth [2]

    50 MHz

    Bandwidth ................ 10 MHz D.C. grid g2 current 50 mA

  • D.C.anodevoltage [1]

    4.5 V

    D.C.anodevoltage .......... 4.5 kV D.C. grid g1 current 450 mA

  • D.C.anodevoltage [2]

    450 V

    D.C.anodevoltage .......... 4.5 kV D.C. grid g1 current 450 mA

  • D.C.gridg2voltage [1]

    325 W

    D.C.gridg2voltage .......... 325 v Driving power, approx. ........ 1000

  • D.C.gridg2voltage [2]

    1000 W

    D.C.gridg2voltage .......... 325 v Driving power, approx. ........ 1000

  • D.C.gridgl voltage .......... ~ [1]

    -75 kW

    D.C.gridgl voltage .......... ~-75 \Y Anode dissipation, approx. 10.5 kW

  • D.C.gridgl voltage .......... ~ [2]

    10.5 kW

    D.C.gridgl voltage .......... ~-75 \Y Anode dissipation, approx. 10.5 kW

  • Load output power ( [1]

    1 kW

    Load output power (1) 10 kW

  • Load output power ( [2]

    10 kW

    Load output power (1) 10 kW

  • ( [1]

    1 W

    (1) - Including power transferred from driver stage and 0.7 dB losses in output circuits.

  • ( [2]

    0.7 W

    (1) - Including power transferred from driver stage and 0.7 dB losses in output circuits.

  • D.C.anodevoltage [1]

    5.2 W

    D.C.anodevoltage .......... 5.2 \ Anode dissipation 12

  • D.C.anodevoltage [2]

    12 W

    D.C.anodevoltage .......... 5.2 \ Anode dissipation 12

  • D.C.gridg2voltage [1]

    400 W

    D.C.gridg2voltage .......... 400 . Grid g2 dissipation 150

  • D.C.gridg2voltage [2]

    150 W

    D.C.gridg2voltage .......... 400 . Grid g2 dissipation 150

  • D.C.gridgl voitage

    250 W

    D.C.gridgl voitage .......... - 250 Grid g1 dissipation

  • D.C.anode current

    6 A

    D.C.anode current . ......... 6

  • Frequency

    860 MHz

    Frequency ... .......... 860 MHz D.C. grid g2 current

  • D.C.anodevoitage [1]

    5

    D.C.anodevoitage .......... 5 kV - pedestal level 25 mA

  • D.C.anodevoitage [2]

    25

    D.C.anodevoitage .......... 5 kV - pedestal level 25 mA

  • D.C.gridg2 voltage

    320 V

    D.C.gridg2 voltage .......... 320 \ D.C. grid g1 current

  • D.C.gridgl voltage [1]

    -80 V

    D.C.gridgl voltage .......... -80 \ - synchronizing level 500 mA

  • D.C.gridgl voltage [2]

    500 V

    D.C.gridgl voltage .......... -80 \ - synchronizing level 500 mA

  • D.C. anode current - pedestal level

    100 A

    D.C. anode current - pedestal level 100 mA

  • synchronizing level

    4.8 W

    -synchronizing level ...... 4.8 A Driving power, approx.

  • Load output power, approx. (

    1 W

    Load output power, approx. (1)

  • D.C. anode voltage [1]

    5.2 kW

    D.C. anode voltage .......... 5.2 kV Anode dissipation e e e 12 kW

  • D.C. anode voltage [2]

    12 kW

    D.C. anode voltage .......... 5.2 kV Anode dissipation e e e 12 kW

  • D.C.gridg2voltage [1]

    400 W

    D.C.gridg2voltage .......... 400 \ Grid g2 dissipation .......... 150 w

  • D.C.gridg2voltage [2]

    150 W

    D.C.gridg2voltage .......... 400 \ Grid g2 dissipation .......... 150 w

  • D.C.gridgt voltage [1]

    250 W

    D.C.gridgt voltage .......... - 250 \Y Grid g1 dissipation. ......... 50 W

  • D.C.gridgt voltage [2]

    50 W

    D.C.gridgt voltage .......... - 250 \Y Grid g1 dissipation. ......... 50 W

  • Peak cathode current [1]

    25 MHz

    Peak cathode current ... ..... 25 A Frequency ................ 1000 MHz

  • Peak cathode current [2]

    1000 MHz

    Peak cathode current ... ..... 25 A Frequency ................ 1000 MHz

  • D.C.anodecurrent

    6 A

    D.C.anodecurrent .......... 6 A

  • D.C.anode voltage [1]

    5 V

    D.C.anode voltage .......... 5 kV D.C.anodecurrent .......... 4 A

  • D.C.anode voltage [2]

    4 V

    D.C.anode voltage .......... 5 kV D.C.anodecurrent .......... 4 A

  • D.C.gridg2voltage [1]

    300 W

    D.C.gridg2voltage .......... 300 \' Drivingpower . ............. 900 w

  • D.C.gridg2voltage [2]

    900 W

    D.C.gridg2voltage .......... 300 \' Drivingpower . ............. 900 w

  • D.C.gridgt voltage [1]

    -80 kW

    D.C.gridgt voltage .......... -80 Vv Anode dissipation, approx. ... . 9 kW

  • D.C.gridgt voltage [2]

    9 kW

    D.C.gridgt voltage .......... -80 Vv Anode dissipation, approx. ... . 9 kW

  • Load output power ( [1]

    1 kW

    Load output power (1) ........ 10 kW

  • Load output power ( [2]

    10 kW

    Load output power (1) ........ 10 kW

  • ( [1]

    1 W

    (1) - Including power transferred from driver stage and 0. 7 dB losses in output circuits.

  • ( [2]

    0 W

    (1) - Including power transferred from driver stage and 0. 7 dB losses in output circuits.

  • ( [3]

    7 W

    (1) - Including power transferred from driver stage and 0. 7 dB losses in output circuits.

  • D.C.anodevoltage [1]

    6 kW

    D.C.anodevoltage .......... 6 kV Anode dissipation . ......... 12 kW

  • D.C.anodevoltage [2]

    12 kW

    D.C.anodevoltage .......... 6 kV Anode dissipation . ......... 12 kW

  • D.C.gridg2 voltage [1]

    800 W

    D.C.gridg2 voltage .......... 800 \' Grid g2 dissipation . ......... 150 w

  • D.C.gridg2 voltage [2]

    150 W

    D.C.gridg2 voltage .......... 800 \' Grid g2 dissipation . ......... 150 w

  • D.C.gridgl voltage [1]

    250 MHz

    D.C.gridgl voltage .......... - 250 \' Frequency ................ 1000 MHz

  • D.C.gridgl voltage [2]

    1000 MHz

    D.C.gridgl voltage .......... - 250 \' Frequency ................ 1000 MHz

  • D.C. anode voltage

    5.7 V

    D.C. anode voltage ....... .. 5.7 kV Average grid g2 current at peak of

  • D.C.gridg2voltage [1]

    700 V

    D.C.gridg2voltage .......... 700 Vv envelope ................ 135 mA

  • D.C.gridg2voltage [2]

    135 V

    D.C.gridg2voltage .......... 700 Vv envelope ................ 135 mA

  • Zero signal anode current [1]

    1.5 A

    Zero signal anode current . . ... 1.5 A Average grid g2 current ... ... 95 mA

  • Zero signal anode current [2]

    95 A

    Zero signal anode current . . ... 1.5 A Average grid g2 current ... ... 95 mA

  • Average anode current at peak of Load impedance

    650 A

    Average anode current at peak of Load impedance ............ 650 Q

  • Average anode current [1]

    3.2 kW

    Average anode current 3.2 A Average load power .......... 6 kW

  • Average anode current [2]

    6 kW

    Average anode current 3.2 A Average load power .......... 6 kW

  • L.oad peak envelope power e

    12 kW

    L.oad peak envelope power e 12 kW

  • Published value [1]

    1 V

    1- % VT (filament voltage) during 60 seconds

  • Published value [2]

    60 V

    1- % VT (filament voltage) during 60 seconds

  • Published value

    3

    3- Grid bias

  • Published value

    4 V

    4 - Anode voltage

  • Published value

    6 V

    6- Screen voltage

  • Published value

    6 V

    6- Driving voltage

  • Published value

    2 A

    2- SECURITY DEVICES AGAINST ANODE, SCREEN, GRID OVERCURRENTS -

  • Published value [1]

    1 A

    1- Overcurrents due to unproper utilisation conditions : the protection can be achieved by 3 relays inserted

  • Published value [2]

    3 A

    1- Overcurrents due to unproper utilisation conditions : the protection can be achieved by 3 relays inserted

  • currents equal to

    1.5 A

    currents equal to 1.5 Imax. are attained, Imax. being the normal current in the considered operating

  • Published value [1]

    2 A

    2- Overcurrents due to stray oscillations or electrode arcings : the protection can be achieved by 3 short-

  • Published value [2]

    3 A

    2- Overcurrents due to stray oscillations or electrode arcings : the protection can be achieved by 3 short-

  • response security devices (grid, screen, anode) acting for currents equal to

    5 A

    response security devices (grid, screen, anode) acting for currents equal to 5 Imax, Imax being the normal

  • current in the considered operating conditions. Each of these [1]

    3 A

    current in the considered operating conditions. Each of these 3 systems acting on the 2 others must

  • current in the considered operating conditions. Each of these [2]

    2 A

    current in the considered operating conditions. Each of these 3 systems acting on the 2 others must