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Specialized - Microwave Tube ·Microwave

CMA1234

Rugged liquid-cooled crossed-field backward-wave oscillator covering approximately 1.06–1.37 GHz with permanent-magnet focusing and at least 250 W output.

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

Description

The CMA1234 is a rugged compact electronically tunable cross-field backward-wave oscillator. It provides at least 250 W from 1.06 to 1.37 GHz and uses metal-ceramic construction, permanent-magnet focusing, and liquid cooling.

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

Microwave

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

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

Microwave

Other

  • output of at least

    250

    output of at least 250 W over the frequency range

  • Heatervoltage ............ccouemuennnn. n

    6.3 V

    Heatervoltage ............ccouemuennnn. n 6.3

  • Heater CUMENt . . . .« v oo e e v i enmeannsenso [1]

    3.5

    Heater CUMENt . . . .« v oo e e v i enmeannsenso 3.5 6.0

  • Heater CUMENt . . . .« v oo e e v i enmeannsenso [2]

    6

    Heater CUMENt . . . .« v oo e e v i enmeannsenso 3.5 6.0

  • Frequency range . .... ........cecrooenonnn [1]

    1.06

    Frequency range . .... ........cecrooenonnn 1.06 1.37

  • Frequency range . .... ........cecrooenonnn [2]

    1.37

    Frequency range . .... ........cecrooenonnn 1.06 1.37

  • Anode to all otherelectrodes

    18

    Anode to all otherelectrodes . . .............. 18

  • Solevoltage ............. ..iiiaeaon [1]

    -0.5 V

    Solevoltage ............. ..iiiaeaon -0.5 -1.5

  • Solevoltage ............. ..iiiaeaon [2]

    -1.5 V

    Solevoltage ............. ..iiiaeaon -0.5 -1.5

  • Gridvoltage . .........ccieeteeariaonann [1]

    -0.1 V

    Gridvoltage . .........ccieeteeariaonann -0.1 -1.0

  • Gridvoltage . .........ccieeteeariaonann [2]

    -1 V

    Gridvoltage . .........ccieeteeariaonann -0.1 -1.0

  • Gridcurrent . ... ...t it e

    1 A

    Gridcurrent . ... ...t it e - 1.0

  • Anodevoltage ............coocueee

    2 V

    Anodevoltage ............coocueee - 2.0

  • ANODECUITBNT . . . v v c v v e s s oo anosanann [1]

    -0.25

    ANODECUITBNT . . . v v c v v e s s oo anosanann -0.25 +2.0

  • ANODECUITBNT . . . v v c v v e s s oo anosanann [2]

    2

    ANODECUITBNT . . . v v c v v e s s oo anosanann -0.25 +2.0

  • Linevoltage ...........cccoenunnnnana [1]

    1.5 V

    Linevoltage ...........cccoenunnnnana 1.5 5.0

  • Linevoltage ...........cccoenunnnnana [2]

    5 V

    Linevoltage ...........cccoenunnnnana 1.5 5.0

  • Linecurrent . ........ecoceeerceaaonasan

    350 A

    Linecurrent . ........ecoceeerceaaonasan 350

  • (

    1 V

    (1} - All voltages are referred to the cathode.

  • Coolant temperature . . max [1]

    80

    Coolant temperature . . max. 80 °c Coolant temperature . . max. 80 °c

  • Coolant temperature . . max [2]

    80

    Coolant temperature . . max. 80 °c Coolant temperature . . max. 80 °c

  • Warm-up time [1]

    5 V

    Warm-up time . ..... 5 - mn Solevoltage ...... -500 -2100 \

  • Warm-up time [2]

    -500 V

    Warm-up time . ..... 5 - mn Solevoltage ...... -500 -2100 \

  • Warm-up time [3]

    -2100 V

    Warm-up time . ..... 5 - mn Solevoltage ...... -500 -2100 \

  • Heater voltage [1]

    6 V

    Heater voltage ... ... 6.0 6.6 \) Grid voltage (3). . . . .- —-100 +100 \

  • Heater voltage [2]

    6.6 V

    Heater voltage ... ... 6.0 6.6 \) Grid voltage (3). . . . .- —-100 +100 \

  • Heater voltage [3]

    3 V

    Heater voltage ... ... 6.0 6.6 \) Grid voltage (3). . . . .- —-100 +100 \

  • Heater voltage [4]

    -100 V

    Heater voltage ... ... 6.0 6.6 \) Grid voltage (3). . . . .- —-100 +100 \

  • Heater voltage [5]

    100 V

    Heater voltage ... ... 6.0 6.6 \) Grid voltage (3). . . . .- —-100 +100 \

  • Heater surge current [1]

    6 V

    Heater surge current . . - 6.0 Anode voltage (3) . . . . - +200 v

  • Heater surge current [2]

    3 V

    Heater surge current . . - 6.0 Anode voltage (3) . . . . - +200 v

  • Heater surge current [3]

    200 V

    Heater surge current . . - 6.0 Anode voltage (3) . . . . - +200 v

  • Load VSWR ( [1]

    2 V

    Load VSWR (2). . . . .. K Line voltage . . . . .. . . - +5.2 kV

  • Load VSWR ( [2]

    5.2 V

    Load VSWR (2). . . . .. K Line voltage . . . . .. . . - +5.2 kV

  • Ambient temperature [1]

    -40 A

    Ambient temperature . —40 +110 C Line current . ...... - 440 mA

  • Ambient temperature [2]

    110 A

    Ambient temperature . —40 +110 C Line current . ...... - 440 mA

  • Ambient temperature [3]

    440 A

    Ambient temperature . —40 +110 C Line current . ...... - 440 mA

  • Heater voltage [1]

    6.3 GHz

    Heater voltage . ... .. 6.3 \' Oscillating frequency : 1.06 1.37 GHz

  • Heater voltage [2]

    1.06 GHz

    Heater voltage . ... .. 6.3 \' Oscillating frequency : 1.06 1.37 GHz

  • Heater voltage [3]

    1.37 GHz

    Heater voltage . ... .. 6.3 \' Oscillating frequency : 1.06 1.37 GHz

  • Heater current

    4.5 A

    Heater current . . . ... 4.5 A

  • Sole voltage [1]

    -0.9 V

    Sole voltage . . . .. ... -0.9 kV Anode voltage . . . ... 970 960 \)

  • Sole voltage [2]

    970 V

    Sole voltage . . . .. ... -0.9 kV Anode voltage . . . ... 970 960 \)

  • Sole voltage [3]

    960 V

    Sole voltage . . . .. ... -0.9 kV Anode voltage . . . ... 970 960 \)

  • Gridvoltage [1]

    -0.4 V

    Gridvoltage . . . . . . .. -0.4 kV Linevoltage. . . .. ... 2.55 4.75 kV

  • Gridvoltage [2]

    2.55 V

    Gridvoltage . . . . . . .. -0.4 kV Linevoltage. . . .. ... 2.55 4.75 kV

  • Gridvoltage [3]

    4.75 V

    Gridvoltage . . . . . . .. -0.4 kV Linevoltage. . . .. ... 2.55 4.75 kV

  • Gridcurrent [1]

    0 mA

    Gridcurrent. . ... ... 0 mA Solecurrent. ....... 15 60 mA

  • Gridcurrent [2]

    15 A

    Gridcurrent. . ... ... 0 mA Solecurrent. ....... 15 60 mA

  • Gridcurrent [3]

    60 A

    Gridcurrent. . ... ... 0 mA Solecurrent. ....... 15 60 mA

  • Linecurrent [1]

    350 W

    Linecurrent. . ... ... 350 mA Output power . ..... 310 540 w

  • Linecurrent [2]

    310 W

    Linecurrent. . ... ... 350 mA Output power . ..... 310 540 w

  • Linecurrent [3]

    540 W

    Linecurrent. . ... ... 350 mA Output power . ..... 310 540 w