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Specialized - Magnetron ·Magnetron

CV8905

High-power fixed-frequency pulsed magnetron covering 2860–2900 MHz. Typical operating data show up to about 1 MW peak RF output with approximately 22–28 kV peak anode voltage and one-microsecond pulses.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
16 V / 3.1 A

Description

Fixed frequency pulse magnetron

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
16 V
Nominal heater current
3.1 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

Magnetron

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Microwave/special-function section; schema has no directly applicable promoted electrode fields; published electrical data preserved in parameters.

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

1971 English Electric Valve

Published operating points and test conditions from this source.

SECTION 1

Magnetron

Other

  • Frequency range

    2900 MHz

    Frequency range 2860 to 2900 MHz

  • Typical peak output power

    1 MW

    Typical peak output power 1.0 MW

  • Heater current

    3.1 A

    Heater current 3.1 A

  • Heater starting current (peak)

    15 A

    Heater starting current (peak) — 15 A

  • Anode voltage (peak)

    30 kV

    Anode voltage (peak) — 30 kV

  • Anode current (peak)

    70 A

    Anode current (peak) — 70 A

  • Cathode terminal tempefature

    100

    Cathode terminal tempefature — 100 °C

  • V.S.W.R. at the output coupler

    1 V

    V.S.W.R. at the output coupler — 1.6:1

  • Heater voltage

    10.5

    Heater voltage 13 10.5 \Y%

  • Anode current (peak)

    70 A

    Anode current (peak) 56 70 A

  • Pulse length

    1

    Pulse length 1.0 1.0 us

  • Pulse repetition rate

    500 s

    Pulse repetition rate 00 500 p.p.s.

  • Anode voltage {peak)

    28 kV

    Anode voltage {peak) 22 28 . kV

  • Output power (peak)

    1000 kW

    Output power (peak) 600 1000 kW

  • Output power (mean)

    500 W

    Output power (mean) 300 500 W

  • Heater voltage (for test)

    10

    Heater voltage (for test) 10 10 \Y

  • Anode current (mean)

    45 mA

    Anode current (mean) 35 45 mA

  • V.S.W.R. at the output coupler

    1 V

    V.S.W.R. at the output coupler 1.15:1 1.15:1

  • Anode voltage (peak)

    30 kV

    Anode voltage (peak) 26 30 - — kV

  • Output power (mean)

    400 W

    Output power (mean) 400 — — — W

  • Frequency

    2900 MHz

    Frequency 2860 2900 - — MHz

  • R.F. bandwidth at % power

    2.5 MHz

    R.F. bandwidth at % power - 2.5 — - MHz

  • Output power (mean)

    320 W

    Output power (mean) 320 W min

  • R.F. bandwidth at % power

    2.5 MHz

    R.F. bandwidth at % power 2.5 MHz max

  • 1. (a) With no anode input power.

    1 a

    1. (a) With no anode input power.

  • minimum capacitance of 4000pF shunted across the heater

    4000

    minimum capacitance of 4000pF shunted across the heater

  • {b)

    595 a

    {b) The M595B has a hum-free heater and has been tested for satis-

  • between 0 and —55°C the cathode heating time is 3 minutes minimum

    3 °C

    between 0 and —55°C the cathode heating time is 3 minutes minimum.

  • leading edge of the voltage pulse above 80% amplitude

    80

    leading edge of the voltage pulse above 80% amplitude. Any capaci-

  • With the valve operating into a mismatch of v.s.w.r. 1.5:1, phased to

    1 a

    With the valve operating into a mismatch of v.s.w.r. 1.5:1, phased to

  • age of the number of input pulses applied during the last 30 seconds of

    30

    age of the number of input pulses applied during the last 30 seconds of

  • 10

    16

    10. Measured with heater voltage of 16V and no anode input power, the

  • heater current limits are 2.8A minimum, 3.4A maximum

    3.4

    heater current limits are 2.8A minimum, 3.4A maximum.

  • 11

    11

    11. Design test only. The maximum frequency change with anode tempera-

  • The periphery of the anode will lie within a 2.160 inch (54.86mm)

    54.86 a

    The periphery of the anode will lie within a 2.160 inch (54.86mm)

  • 13

    13

    13. The common cathode connection is indicated by letter C.