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

RS2042SK

High-power transmitting tetrode designed primarily for broadcast, FM, VHF, medium-wave, or short-wave transmitter RF power service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
8.5 V / 920 A

Description

Coaxial metal-ceramic tetrode, vapor-condensation-cooled. The version RS 2042 SK is particularly suitable for broadcast transmitters up to 300 kW medium wave and 250 kW short wave, for grid-current free operated modulators in transmitters up to 600 kW, and for use as switching tube in PDM transmitters up to 600 kW.

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
8.5 V
Nominal heater current
920 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
0.22 S
Amplification factor
4.5
Max plate voltage
23000 V
Max screen voltage
2200 V
Max plate dissipation
300000 W
Max screen dissipation
5000 W
Max grid dissipation
1500 W
Max cathode current
50 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

    4.5

  • Transconductance

    220000 µS

  • Emission current at UA = UG2 = UG1 = 600 V

    300 A V

  • Amplification factor of screen grid

    4,5

  • at UA = 6 kV, UG2 = 800

    1200 V, I A = 20 A kV

  • Transconductance

    220 mA/V mA/V

Other

  • Heater voltage

    8,5 V V

  • Heater current

    ≈ 920 A A

  • Permissible starting current

    ≤ 3000 A A

  • Frequency

    55 MHz MHz

  • Anode voltage (dc)

    23 kV kV

  • Screen grid voltage (dc)

    1600 V V

  • Control grid voltage (dc)

    – 1200 V V

  • Cathode current (dc)

    50 A A

  • Peak cathode current

    300 A A

  • Anode dissipation

    300 kW 3) kW

  • Screen grid dissipation

    4,0 kW kW

  • Control grid dissipation

    1,5 kW kW

  • Frequency

    50 MHz MHz

  • Output power

    320 + 13,7 2) kW 1) kW

  • Anode voltage (dc)

    12 kV kV

  • Screen grid voltage (dc)

    1100 V V

  • Control grid voltage (dc)

    – 400 V V

  • Peak control grid voltage (ac)

    540 V V

  • Anode current (dc)

    40,5 A A

  • Screen grid current (dc)

    1,0 A A

  • Control grid current (dc)

    0,6 A A

  • Anode input power

    485 kW A

  • Drive power

    0,3 + 13,7 2) kW 1) kW

  • Anode dissipation

    165 kW kW

  • Screen grid dissipation

    1100 W W

  • Control grid dissipation

    60 W W

  • Efficiency

    66 %

  • Anode load resistance

    181 Ω Ω

  • Transmitter Tetrode

    2042 HF

  • Frequency

    150 MHz MHz

  • Anode voltage (dc)

    17 kV kV

  • Screen grid voltage (dc)

    1600 V V

  • Control grid voltage (dc)

    – 1200 V V

  • Cathode current (dc)

    50 A A

  • Peak cathode current

    300 A A

  • Anode dissipation

    300 kW 3) kW

  • Screen grid dissipation

    4,0 kW kW

  • Control grid dissipation

    1,5 kW kW

  • Frequency

    ≤ 150 MHz MHz

  • Pulse duration

    0,4 × 10–3 s

  • Pulse seperation

    0,6 × 10–3 s

  • Pulse output power

    400 + 16 2) kW 1) kW

  • Anode voltage (dc)

    15 kV kV

  • Screen grid voltage (dc)

    1100 V V

  • Control grid voltage (dc)

    – 430 V V

  • Peak pulse control grid voltage (ac)

    250 V V

  • Pulse anode current (dc)

    42 A A

  • Pulse screen grid current

    1,0 A A

  • Pulse control grid current (dc)

    0,7 A A

  • Pulse anode input power

    630 kW A

  • Pulse drive power

    16 kW 1) kW

  • Pulse anode dissipation

    230 kW kW

  • Pulse screen grid dissipation

    1100 W W

  • Pulse control grid dissipation

    60 W W

  • Pulse efficiency

    63 %

  • Anode load resistance

    190 Ω Ω

  • Transmitter Tetrode

    2042 SK

  • Frequency

    30 MHz MHz

  • Anode voltage (dc)

    15 V V

  • Screen grid voltage (dc)

    2200 V V

  • Control grid voltage (dc)

    – 1200 V V

  • Cathode current (dc)

    50 A A

  • Peak cathode current

    300 A A

  • Anode dissipation

    300 kW 5) kW

  • Screen grid dissipation

    5,0 kW kW

  • Control grid dissipation

    1,5 kW kW

  • Frequency

    ≤ 30 MHz MHz

  • Carrier power

    325 kW 1) kW

  • Anode voltage (dc)

    12 kV kV

  • Screen grid voltage (dc)

    1100 V V

  • Control grid bias (dc), fixed

    – 450 V V

  • Control grid resistance

    65 Ω Ω

  • Peak control grid voltage (ac)

    900 V V

  • Anode current (dc)

    33 A A

  • Screen grid current (dc)

    2,5 A A

  • Control grid current (dc)

    4,0 A A

  • Anode input power

    396 kW A

  • Drive power

    3,5 kW 1) kW

  • Anode dissipation

    71 kW 2) kW

  • Screen grid dissipation

    2,75 kW kW

  • Control grid dissipation

    0,7 kW kW

  • Efficiency

    82 %

  • Anode load resistance

    180 Ω Ω

  • Modulation factor

    100 %

  • Peak screen grid voltage (ac)

    650 V V

  • Modulation power

    208 kW kW

Capacitance

  • Cathode/control grid

    ≈ 315 pF pF

  • Cathode/screen grid

    ≈ 35 pF pF

  • Cathode/anode

    ≈ 1,1 pF 1) pF

  • Control grid/screen grid

    ≈ 450 pF pF

  • Control grid/anode

    ≈ 4,5 pF 1) pF

  • Screen grid/anode

    ≈ 100 pF pF

  • LL electrolytic target

    1/ 4″ hose RöEl7 Q81-X512

  • Transmitter Tetrode

    2042 HF