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Power - Tetrode (NOT beam) (over 1000V 100W) ·Tetrode

RS2048CJ

Transmitting power tetrode designed for RF amplification, communications, industrial RF generation, oscillation, modulation, or frequency multiplication.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
9 V / 112 A

Description

Compact, coaxial metal-ceramic tetrode, water-cooled. Due to the low feedback capacitance particularly suitable for high power gain in grounded cathode circuits. Emission current at UA = UG2 = UG1 = 300 V I em 40 A 1) Measured by means of a 50 cm diameter screening plate in the screen grid terminal plane.

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
9 V
Nominal heater current
112 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

Tetrode

X-ray radiationInterelectrode capacitances
Transconductance
0.07 S
Amplification factor
7
Max plate voltage
14000 V
Max screen voltage
1000 V
Max plate dissipation
30000 W
Max screen dissipation
300 W
Max grid dissipation
70 W
Max cathode current
7 A

Maximum ratings promoted from published rating tables; additional condition-specific values 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

1963 Siemens

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

  • Amplification factor

    7

  • Transconductance

    70000 µS

  • Emission current at UA = UG2 = UG1 = 300 V

    40 A V

  • Amplification factor of screen grid

    7,0

  • at UG2 = 600

    1000 V, UA = 2 kV, I A = 3 A V

  • Transconductance

    70 mA/V mA/V

  • at UA = 2 kV, UG2 = 800 V, I A = 2

    4 A kV

Other

  • Heater voltage

    9,0 V V

  • Heater current

    ≈ 112 A A

  • Frequency

    50 110 MHz MHz

  • Anode voltage (dc)

    14 14 kV kV

  • Screen grid voltage (dc)

    1000 1000 V V

  • Control grid voltage (dc)

    – 300 – 300 V V

  • Cathode current (dc)

    7 A A

  • Peak cathode current

    35 35 A A

  • Anode dissipation

    30 30 kW kW

  • Control grid dissipation

    70 70 W W

  • Screen grid dissipation

    300 250 W W

  • Output power

    53 37,5 kW 1) kW

  • Anode voltage (dc)

    12 10 kV kV

  • Screen grid voltage (dc)

    800 800 V V

  • Control grid voltage (dc)

    – 230 – 220 V V

  • Peak control grid voltage (ac)

    320 300 V V

  • Anode current (dc)

    5,6 4,9 A A

  • Screen grid current (dc)

    0,22 0,19 A A

  • Control grid current (dc)

    0,6 0,55 A A

  • Anode input power

    67 49 kW A

  • Drive power

    180 140 W 1) W

  • Anode dissipation

    14 11 kW kW

  • Screen grid dissipation

    176 152 W W

  • Control grid dissipation

    45 33 W W

  • Efficiency

    79 77 %

  • Anode load resistance

    1160 1080 Ω Ω

  • Transmitter Tetrode

    2048 CJ

  • The temperature of the metal-ceramic seals must not

    220 °C at any point. Sufficient cooling

  • The cooling water diagram is valid for a water inlet temperature

    35 °C. The maximum permissible a

  • pressure of the cooling water at the water

    6 bar. Please observe the instructions on water

Capacitance

  • Cathode/control grid

    ≈ 76 pF pF

  • Cathode/screen grid

    ≈6 pF pF

  • Cathode/anode

    ≈ 0,09 pF 1) pF

  • Control grid/screen grid

    ≈ 112 pF pF

  • Control grid/anode

    ≈ 0,8 pF 1) pF

  • Screen grid/anode

    ≈ 21 pF pF

  • Transmitter Tetrode

    2048 CJ

Cooling

  • Transmitter Tetrode

    2048 CJ

  • Transmitter Tetrode

    2048 CJ