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Power - Triode ·Triode

6885

Forced-air-cooled planar triode for oscillator, amplifier, and frequency-multiplier service through approximately 3 GHz, using low-inductance cavity mounting.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 2.1 A

Description

The 6885 is a forced-air-cooled planar triode used as an oscillator, amplifier, or frequency multiplier at very-high and ultra-high frequencies up to 3000 MHz. Its electrode terminals are designed for low-inductance mounting in resonant cavities.

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
2.1 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
Max plate dissipation
250 W

Electrical ratings/characteristics audited; additional published numeric data 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

Triode

Other

  • The anode ca n dissipate

    250

    The anode ca n dissipate 250 W.

  • Heater voltage ( L [1]

    6.3 V

    Heater voltage ( L 6.3 5 % \

  • Heater voltage ( L [2]

    5 V

    Heater voltage ( L 6.3 5 % \

  • Heater current, approximate

    2.1 A

    Heater current, approximate . ............... 2.1 A

  • cathode-anode

    0.06

    cathode-anode .................... 0.06 pF

  • Maximum temperature at the radiator top . ..... see curves (page

    4

    Maximum temperature at the radiator top . ..... see curves (page 4)

  • {

    1

    {1) In high frequency operation, the cathode is subjected to considerable back bombardment, which

  • DCanodevoltage . .......covvunnrnsons [1]

    1.2 V

    DCanodevoltage . .......covvunnrnsons 1.2 1.5 kV

  • DCanodevoltage . .......covvunnrnsons [2]

    1.5 V

    DCanodevoltage . .......covvunnrnsons 1.2 1.5 kV

  • DCaridvoltage . .....¢%.oeeienneenennnn — [1]

    -150 V

    DCaridvoltage . .....¢%.oeeienneenennnn —-150 —150 \)

  • DCaridvoltage . .....¢%.oeeienneenennnn — [2]

    -150 V

    DCaridvoltage . .....¢%.oeeienneenennnn —-150 —150 \)

  • DCcathodecurrent . ..........ccvuvenrunnn [1]

    250 A

    DCcathodecurrent . ..........ccvuvenrunnn 250 250 mA

  • DCcathodecurrent . ..........ccvuvenrunnn [2]

    250 A

    DCcathodecurrent . ..........ccvuvenrunnn 250 250 mA

  • DC grid current et e [1]

    50 A

    DC grid current et e 50 50 mA

  • DC grid current et e [2]

    50 A

    DC grid current et e 50 50 mA

  • Anode dissipation

    0 W

    Anode dissipation .. .00

  • DCanodevoltage ...........covuennn.n [1]

    1.2 V

    DCanodevoltage ...........covuennn.n 1.2 1.2 1.2 kV

  • DCanodevoltage ...........covuennn.n [2]

    1.2 V

    DCanodevoltage ...........covuennn.n 1.2 1.2 1.2 kV

  • DCanodevoltage ...........covuennn.n [3]

    1.2 V

    DCanodevoltage ...........covuennn.n 1.2 1.2 1.2 kV

  • Gridbiasvoltage ( [1]

    4 V

    Gridbiasvoltage (4) .. ................. ... —60 —-45 -30 \'

  • Gridbiasvoltage ( [2]

    -60 V

    Gridbiasvoltage (4) .. ................. ... —60 —-45 -30 \'

  • Gridbiasvoltage ( [3]

    -45 V

    Gridbiasvoltage (4) .. ................. ... —60 —-45 -30 \'

  • Gridbiasvoltage ( [4]

    -30 V

    Gridbiasvoltage (4) .. ................. ... —60 —-45 -30 \'

  • DCanodecurrent . ... .....ioueenvannnnn [1]

    200 A

    DCanodecurrent . ... .....ioueenvannnnn 200 200 200 mA

  • DCanodecurrent . ... .....ioueenvannnnn [2]

    200 A

    DCanodecurrent . ... .....ioueenvannnnn 200 200 200 mA

  • DCanodecurrent . ... .....ioueenvannnnn [3]

    200 A

    DCanodecurrent . ... .....ioueenvannnnn 200 200 200 mA

  • DC grid current, @approX. .. ... ..o [1]

    20 A

    DC grid current, @approX. .. ... ..o 20 10 3 mA

  • DC grid current, @approX. .. ... ..o [2]

    10 A

    DC grid current, @approX. .. ... ..o 20 10 3 mA

  • DC grid current, @approX. .. ... ..o [3]

    3 A

    DC grid current, @approX. .. ... ..o 20 10 3 mA

  • {

    2

    {2) Without amplitude anode modulation

  • {

    3 V

    {3) With amplitude anode modulation : the indicated anode voltage is the maximum peak value.

  • (

    4

    (4) Cathode bias resistor operation

  • For this case, the curves (page

    4 W

    For this case, the curves (page 4) indicate the necessary air flow as a function of the anode dissipation with air

  • intake temperature ranging from [1]

    20

    intake temperature ranging from 20 °C to 50 °C and also the air pressure at the intake as a function of the

  • intake temperature ranging from [2]

    50

    intake temperature ranging from 20 °C to 50 °C and also the air pressure at the intake as a function of the

  • springs ; an example of such a contact is given page

    5

    springs ; an example of such a contact is given page 5. Depending on the structure of the circuit, the grid contact

  • Anode voltage [1]

    12 V

    Anode voltage : 1,2 kV - Anode current : 200 mA

  • Anode voltage [2]

    200 V

    Anode voltage : 1,2 kV - Anode current : 200 mA

  • FOR INLET AIR TEMPERATURES OF [1]

    20

    FOR INLET AIR TEMPERATURES OF 20°C AND 50°C

  • FOR INLET AIR TEMPERATURES OF [2]

    50

    FOR INLET AIR TEMPERATURES OF 20°C AND 50°C

  • Published value [1]

    0.9

    0.9 @ 2.1-1.9—HEATER

  • Published value [2]

    2.1

    0.9 @ 2.1-1.9—HEATER

  • Published value [3]

    -1.9

    0.9 @ 2.1-1.9—HEATER

  • Published value [1]

    0

    0] 1.3 CATHODE

  • Published value [2]

    1.3

    0] 1.3 CATHODE

  • l—@ [1]

    23.2

    l—@ 23.2-22.6 GRID

  • l—@ [2]

    -22.6

    l—@ 23.2-22.6 GRID

  • dans la gamme des hyperfréquences jusqu'a [1]

    3 MHz

    dans la gamme des hyperfréquences jusqu'a 3 000 MHz.

  • dans la gamme des hyperfréquences jusqu'a [2]

    0 MHz

    dans la gamme des hyperfréquences jusqu'a 3 000 MHz.

  • L’anode peut dissiper

    250

    L’anode peut dissiper 250 W.

  • Tensiondechauffage (

    1 V

    Tensiondechauffage (1) .............

  • Cathodegrille [1]

    5

    Cathodegrille 5 hud oo 14 oF

  • Cathodegrille [2]

    14

    Cathodegrille 5 hud oo 14 oF

  • Grille-anode .. ............... e e

    36

    Grille-anode .. ............... e e 3,6 pF

  • Cathode-anode .. ...... .. ...ttt [1]

    0

    Cathode-anode .. ...... .. ...ttt 0, 06 pF

  • Cathode-anode .. ...... .. ...ttt [2]

    6

    Cathode-anode .. ...... .. ...ttt 0, 06 pF

  • Pente (pour un courant anodique de [1]

    150 A

    Pente (pour un courant anodique de 150 mA) . ............... 25 mA/V

  • Pente (pour un courant anodique de [2]

    25 A

    Pente (pour un courant anodique de 150 mA) . ............... 25 mA/V

  • (

    1 V

    (1) En fonctionnement permanent a des fréquences élevées il est nécessaire de réduire la tension de chauffage

  • Tension continued’anode [1]

    1 V

    Tension continued’anode . ................. 1, 2 1,5 kV

  • Tension continued’anode [2]

    2 V

    Tension continued’anode . ................. 1, 2 1,5 kV

  • Tension continued’anode [3]

    15 V

    Tension continued’anode . ................. 1, 2 1,5 kV

  • Tension continuedegrille [1]

    150 V

    Tension continuedegrille . .. ... ............ - 150 - 150 Vv

  • Tension continuedegrille [2]

    150 V

    Tension continuedegrille . .. ... ............ - 150 - 150 Vv

  • Courant continudecathode [1]

    250 A

    Courant continudecathode . ............... 250 250 mA

  • Courant continudecathode [2]

    250 A

    Courant continudecathode . ............... 250 250 mA

  • Courantcontinudegrille [1]

    50 A

    Courantcontinudegrille . ................. 50 50 mA

  • Courantcontinudegrille [2]

    50 A

    Courantcontinudegrille . ................. 50 50 mA

  • Puissance dissipable sur l'anode [1]

    250 W

    Puissance dissipable sur l'anode . ............. 250 250 w

  • Puissance dissipable sur l'anode [2]

    250 W

    Puissance dissipable sur l'anode . ............. 250 250 w

  • Puissance dissipablesur lagrille [1]

    20 W

    Puissance dissipablesur lagrille .............. 2,0 2,0 W

  • Puissance dissipablesur lagrille [2]

    20 W

    Puissance dissipablesur lagrille .............. 2,0 2,0 W

  • Fréquence . ..........coiiieienrnnnns [1]

    1 MHz

    Fréquence . ..........coiiieienrnnnns 1 000 1 500 3 000 MHz

  • Fréquence . ..........coiiieienrnnnns [2]

    0 MHz

    Fréquence . ..........coiiieienrnnnns 1 000 1 500 3 000 MHz

  • Fréquence . ..........coiiieienrnnnns [3]

    1 MHz

    Fréquence . ..........coiiieienrnnnns 1 000 1 500 3 000 MHz

  • Fréquence . ..........coiiieienrnnnns [4]

    500 MHz

    Fréquence . ..........coiiieienrnnnns 1 000 1 500 3 000 MHz

  • Fréquence . ..........coiiieienrnnnns [5]

    3 MHz

    Fréquence . ..........coiiieienrnnnns 1 000 1 500 3 000 MHz

  • Fréquence . ..........coiiieienrnnnns [6]

    0 MHz

    Fréquence . ..........coiiieienrnnnns 1 000 1 500 3 000 MHz

  • Tension continued’anode [1]

    12 V

    Tension continued’anode .................. 1,2 1,2 1,2 kV

  • Tension continued’anode [2]

    12 V

    Tension continued’anode .................. 1,2 1,2 1,2 kV

  • Tension continued’anode [3]

    12 V

    Tension continued’anode .................. 1,2 1,2 1,2 kV

  • Tension de polarisation de gritle ( [1]

    4 V

    Tension de polarisation de gritle (4) . ......... -60 -45 -30 \')

  • Tension de polarisation de gritle ( [2]

    -60 V

    Tension de polarisation de gritle (4) . ......... -60 -45 -30 \')

  • Tension de polarisation de gritle ( [3]

    -45 V

    Tension de polarisation de gritle (4) . ......... -60 -45 -30 \')

  • Tension de polarisation de gritle ( [4]

    -30 V

    Tension de polarisation de gritle (4) . ......... -60 -45 -30 \')

  • Courant continud’anode [1]

    200 A

    Courant continud’anode . ................. 200 200 200 mA

  • Courant continud’anode [2]

    200 A

    Courant continud’anode . ................. 200 200 200 mA

  • Courant continud’anode [3]

    200 A

    Courant continud’anode . ................. 200 200 200 mA

  • Courant continu de grille, environ [1]

    20 A

    Courant continu de grille, environ . ........... 20 10 3 mA

  • Courant continu de grille, environ [2]

    10 A

    Courant continu de grille, environ . ........... 20 10 3 mA

  • Courant continu de grille, environ [3]

    3 A

    Courant continu de grille, environ . ........... 20 10 3 mA

  • Puissance utile approximative .............. a0 [1]

    65 W

    Puissance utile approximative .............. a0 65 20 W

  • Puissance utile approximative .............. a0 [2]

    20 W

    Puissance utile approximative .............. a0 65 20 W

  • Le radiateur d’anode doit

    8 A

    Le radiateur d’anode doit 8tre refroidi par un courant d'air guidé par une canalisation qui épouse partiel-

  • émetteurs [1]

    3 W

    émetteurs 3 cavité. Les courbes {page 4) indiquent, dans ce cas, le débit dair nécessaire en fonction de la dissipation

  • émetteurs [2]

    4 W

    émetteurs 3 cavité. Les courbes {page 4) indiquent, dans ce cas, le débit dair nécessaire en fonction de la dissipation

  • Published value [1]

    0

    0, 3 mm par rapport a |'axe de la connexion cathode. '

  • Published value [2]

    3

    0, 3 mm par rapport a |'axe de la connexion cathode. '

  • Tension d'anode [1]

    12 V

    Tension d'anode : 1,2 kV - Courant d'anode : 200 mA

  • Tension d'anode [2]

    200 V

    Tension d'anode : 1,2 kV - Courant d'anode : 200 mA