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Specialized - Microwave Tube ·Microwave

CMA1231

Rugged liquid-cooled crossed-field backward-wave oscillator covering approximately 0.52–0.67 GHz with permanent-magnet focusing and at least 260 W output.

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

Description

The CMA1231 is a rugged compact electronically tunable cross-field backward-wave oscillator for airborne and other demanding equipment. It provides at least 260 W from 0.52 to 0.67 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

    260

    output of at least 260 W over the frequency range

  • Heatervoltage ............cooiiiiiinenennn

    6.3 V

    Heatervoltage ............cooiiiiiinenennn 6.3 \)

  • Heatercurrent . ... .. ... ... ..ottt [1]

    3.5 A

    Heatercurrent . ... .. ... ... ..ottt 3.5 6.0 A

  • Heatercurrent . ... .. ... ... ..ottt [2]

    6 A

    Heatercurrent . ... .. ... ... ..ottt 3.5 6.0 A

  • Frequency range ..... .........c.couiuennenn [1]

    0.52 GHz

    Frequency range ..... .........c.couiuennenn 0.52 0. 67 GHz

  • Frequency range ..... .........c.couiuennenn [2]

    0 GHz

    Frequency range ..... .........c.couiuennenn 0.52 0. 67 GHz

  • Frequency range ..... .........c.couiuennenn [3]

    67 GHz

    Frequency range ..... .........c.couiuennenn 0.52 0. 67 GHz

  • Anode to all otherelectrodes

    22

    Anode to all otherelectrodes . . .............. - 22 pF

  • Solevoltage ............. c....... e — [1]

    -0.5 V

    Solevoltage ............. c....... e —-0.5 -1.5 KV

  • Solevoltage ............. c....... e — [2]

    -1.5 V

    Solevoltage ............. c....... e —-0.5 -1.5 KV

  • Solecurrent ........... e e [1]

    -80 A

    Solecurrent ........... e e -80 0 mA

  • Solecurrent ........... e e [2]

    0 mA

    Solecurrent ........... e e -80 0 mA

  • Gridvoltage . ...........c.ciiuieninnennnn [1]

    0.1 V

    Gridvoltage . ...........c.ciiuieninnennnn. 0.1 -1.0 KV

  • Gridvoltage . ...........c.ciiuieninnennnn [2]

    -1 V

    Gridvoltage . ...........c.ciiuieninnennnn. 0.1 -1.0 KV

  • Gridcurrent . ..... £ e e

    1 A

    Gridcurrent . ..... £ e e - 1.0 mA

  • Anodevoltage . .................. ... ... ...,

    2 V

    Anodevoltage . .................. ... ... ..., - 2.0 kV

  • Anodecurrent ....................S [1]

    -250 mA

    Anodecurrent ....................S —0.25 +2.0 mA

  • Anodecurrent ....................S [2]

    2 A

    Anodecurrent ....................S —0.25 +2.0 mA

  • Linevoltage [1]

    0 V

    Linevoltage ................... 0o, 1.5 5.0 kv

  • Linevoltage [2]

    1.5 V

    Linevoltage ................... 0o, 1.5 5.0 kv

  • Linevoltage [3]

    5 V

    Linevoltage ................... 0o, 1.5 5.0 kv

  • Linecurrent . ............c.cviiunnennn

    350 A

    Linecurrent . ............c.cviiunnennn 350 mA

  • (

    1 V

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

  • Coolant temperature . . max [1]

    80

    Coolant temperature . . max. 80 °cC Coolant temperature . . max. 80 °C¢C

  • Coolant temperature . . max [2]

    80

    Coolant temperature . . max. 80 °cC Coolant temperature . . max. 80 °C¢C

  • Warm-up time [1]

    5 V

    Warm-up time . ..... 5 - mn Sole voltage (3). . . . . . -50 +50 \Y

  • Warm-up time [2]

    3 V

    Warm-up time . ..... 5 - mn Sole voltage (3). . . . . . -50 +50 \Y

  • Warm-up time [3]

    -50 V

    Warm-up time . ..... 5 - mn Sole voltage (3). . . . . . -50 +50 \Y

  • Warm-up time [4]

    50 V

    Warm-up time . ..... 5 - mn Sole voltage (3). . . . . . -50 +50 \Y

  • Heater voltage [1]

    6.1 V

    Heater voltage ... ... 6.1 6.6 \2 Grid voltage cee o -1 kV

  • Heater voltage [2]

    6.6 V

    Heater voltage ... ... 6.1 6.6 \2 Grid voltage cee o -1 kV

  • Heater voltage [3]

    2 V

    Heater voltage ... ... 6.1 6.6 \2 Grid voltage cee o -1 kV

  • Heater voltage [4]

    -1 V

    Heater voltage ... ... 6.1 6.6 \2 Grid voltage cee o -1 kV

  • Heater surge current . . — [1]

    10 V

    Heater surge current . . — 10 A Anode voltage RN - 2.2 kV

  • Heater surge current . . — [2]

    2.2 V

    Heater surge current . . — 10 A Anode voltage RN - 2.2 kV

  • Load VSWR ( [1]

    2 V

    Load VSWR (2). .. ... - 3:1 Line voltage. . . . . ... - 5.2 kV

  • Load VSWR ( [2]

    3 V

    Load VSWR (2). .. ... - 3:1 Line voltage. . . . . ... - 5.2 kV

  • Load VSWR ( [3]

    1 V

    Load VSWR (2). .. ... - 3:1 Line voltage. . . . . ... - 5.2 kV

  • Load VSWR ( [4]

    5.2 V

    Load VSWR (2). .. ... - 3:1 Line voltage. . . . . ... - 5.2 kV

  • Ambient temperature [1]

    -40 A

    Ambient temperature . —40 +110 °c Linecurrent . ...... — 375 mA

  • Ambient temperature [2]

    110 A

    Ambient temperature . —40 +110 °c Linecurrent . ...... — 375 mA

  • Ambient temperature [3]

    375 A

    Ambient temperature . —40 +110 °c Linecurrent . ...... — 375 mA

  • Heater voltage [1]

    6.3 GHz

    Heater voltage ... ... 6.3 \Y, Oscillating frequency : 0.52 0.67 GHz

  • Heater voltage [2]

    0.52 GHz

    Heater voltage ... ... 6.3 \Y, Oscillating frequency : 0.52 0.67 GHz

  • Heater voltage [3]

    0.67 GHz

    Heater voltage ... ... 6.3 \Y, Oscillating frequency : 0.52 0.67 GHz

  • Heater current

    4.5 A

    Heater current . ... . .. 4.5 A

  • Solevoltage . . ... ... ! [1]

    -0.9 V

    Solevoltage . . ... ... ! -0.9 kV Anode voltage . .. ... 0.89 0.90 kV

  • Solevoltage . . ... ... ! [2]

    0.89 V

    Solevoltage . . ... ... ! -0.9 kV Anode voltage . .. ... 0.89 0.90 kV

  • Solevoltage . . ... ... ! [3]

    0.9 V

    Solevoltage . . ... ... ! -0.9 kV Anode voltage . .. ... 0.89 0.90 kV

  • Gridvoltage [1]

    -0.3 V

    Gridvoltage . . . . . ... -0.3 kV Linevoltage. . . .. ... 2.60 4.55 kV

  • Gridvoltage [2]

    2.6 V

    Gridvoltage . . . . . ... -0.3 kV Linevoltage. . . .. ... 2.60 4.55 kV

  • Gridvoltage [3]

    4.55 V

    Gridvoltage . . . . . ... -0.3 kV Linevoltage. . . .. ... 2.60 4.55 kV

  • Gridcurrent [1]

    0 mA

    Gridcurrent. . ... ... 0 mA Solecurrent. ....... -15 -30 mA

  • Gridcurrent [2]

    -15 A

    Gridcurrent. . ... ... 0 mA Solecurrent. ....... -15 -30 mA

  • Gridcurrent [3]

    -30 A

    Gridcurrent. . ... ... 0 mA Solecurrent. ....... -15 -30 mA

  • Linecurrent [1]

    350 W

    Linecurrent........ 350 mA Output power . ..... 280 350 w

  • Linecurrent [2]

    280 W

    Linecurrent........ 350 mA Output power . ..... 280 350 w

  • Linecurrent [3]

    350 W

    Linecurrent........ 350 mA Output power . ..... 280 350 w

  • RF output

    21

    RF output 21