Skip to main content

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

4647

High-power RF tetrode designed for continuous-wave and pulsed amplification to approximately 1 GHz. RCA documentation provides RF, pulse, cooling, and application-specific operating limits.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
3.7 V / 840 A

Description

High-power RF tetrode for CW and pulsed amplification to 1000 MHz; type 4647. The RCA source was reviewed for heater/filament data, maximum ratings, RF and pulse operating conditions, capacitances, cooling requirements, and application-specific limits.

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
3.7 V
Nominal heater current
840 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
Amplification factor
9
Max plate voltage
32000 V
Max screen voltage
1500 V
Max plate dissipation
125000 W
Max cathode current
23 A

Published maximum ratings/general electrical characteristics promoted directly; pulse, RF, capacitance, cooling, and service-specific values retained in TUBE_SECTION_PARAMETER.

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 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Maximum plate voltage

    32000 V

    PromotedValue

  • Maximum screen-grid voltage

    1500 V

    PromotedValue

  • Maximum plate dissipation

    20000 W

    PromotedValue

  • Maximum cathode/plate current

    1.7 A

    PromotedValue

  • Maximum Ceramic-Insulator Temperature

    150 degC

    Published datasheet value

  • Maximum Metal -Surface Temperature

    100

    Published datasheet value

  • Peak Positive-Pulse Grid-No.2 Voltagel.k . . 1500

    1.5 A

    Pulse

  • Grid-No.t Voltage

    400 mA

    Published datasheet value

  • Peak Plate Current

    28 mA

    Published datasheet value

  • Peak Grid-No.2 Current

    2 mA

    Published datasheet value

  • Peak Rectified Grid-No.t Current

    2.5 mA

    Published datasheet value

  • DC Plate Current

    1.7 mA

    Published datasheet value

  • DC Grid-No.2 Current

    120 mA

    Published datasheet value

  • DC Grid-No.1 Current

    150 mA

    Published datasheet value

  • In Class 8 service at 425 kHz with a rectangular waveshape pulse at a

    8

    Pulse

  • DC Plate Voltage

    22000 V

    Published datasheet value

  • DC Grid-No.1 Voltage

    400 mA

    Published datasheet value

  • DC Plate Current

    23 mA

    Published datasheet value

  • Plate Dissipationm

    125000 W

    Published datasheet value

  • Grid-No.2 Dissipationm

    1800 W

    Published datasheet value

  • ,,..~ Grid-No.t Dissipationm

    1500 W

    Published datasheet value

  • DC Grid-No.2 Voltage

    1.1 A

    Published datasheet value

  • DC Plate Current

    13 mA

    Published datasheet value

  • Plate Dissipationm

    75000 W

    Published datasheet value

  • Grid-No.2 Dissipationm

    1300 W

    Published datasheet value

Characteristics

  • Mu / amplification factor

    9

    PromotedValue

  • Heater/filament voltage

    3.7 V

    Nominal operating value

  • Heater/filament current

    840 A

    Nominal operating value

  • ■ Pulsed Output up tc: 500 kW peak (4647)

    500000 W

    Pulse

  • ■ Full Input to 1000 MHz (Each Type)

    1000 MHz

    Published datasheet value

  • ■ Power Gain up to 28 d6 (Each Type)

    28

    Published datasheet value

  • Current, do operating,

    840

    Published datasheet value

  • Voltage at 840 A

    3.7 V

    Published datasheet value

  • Operating Voltage

    60 V

    Published datasheet value

  • Voltage Before Applying Plate Voltage

    60 V

    Published datasheet value

  • Mu-Factor (grid No.2 to grid No.1)

    9

    Published datasheet value

  • Grid No.1 to plate

    0.3 pF

    Published datasheet value

  • Grid No.1 to grid No.2 and cathode

    680 pF

    Published datasheet value

  • Plate to cathode and grid No.2

    85 pF

    Published datasheet value

  • Grid No.2 to cathode

    130 pF

    Published datasheet value

  • Grid No.2 to grid No.t

    425 pF

    Published datasheet value

  • Grid No.1 to cathode

    255 pF

    Published datasheet value

  • Minimum Storage Temperatureb

    65

    Published datasheet value

  • Peak Positive-Pulse Plate Voltageh

    32000 V

    Pulse

  • duty factor9 of 0.06 and a pulse duration9 of 2000 microseconds

    0.06 us

    Pulse

  • Peak Positive-Pulse Plate Voltageh

    30000 V

    Pulse

  • Peak Positive-Pulse Grid-No.2 Voltagel

    1400 V

    Pulse

  • Peak Negative-Pulse Grid-No.1 Voltagen

    225 V

    Pulse

  • Peak Plate Current

    25

    Published datasheet value

  • Peak Grid-No.2 Current

    1.3

    Published datasheet value

  • Peak Rectified Grid-No.1 Current

    2.5

    Published datasheet value

  • DC Plate Current

    1.5

    Published datasheet value

  • DC Grid-No.2 Current

    80 mA

    Published datasheet value

  • DC Grid-No.1 Current

    150 mA

    Published datasheet value

  • Peak Driver Power Output (approx.l

    750

    Published datasheet value

  • Output Circuit Efficiency (approx.)

    95

    Published datasheet value

  • Useful Peak Power Output

    500000 W

    Published datasheet value

  • DC Plate Voltage

    20000 V

    Published datasheet value

  • DC Grid-No.2 Voltage

    1200 V

    Published datasheet value

  • DC Plate Current

    19

    Published datasheet value

  • DC Grid-N o.2 Current

    8

    Published datasheet value

  • DC Grid-N o.1 Current

    18

    Published datasheet value

  • Driver Power (approx.)

    500

    Published datasheet value

  • Circuit Efficiency (approx.l

    95

    Published datasheet value

  • Useful Power Output (approx.)

    250000 W

    Published datasheet value

  • DC Plate Voltage

    16000 V

    Published datasheet value

  • DC Plate Voltage

    14000 V

    Published datasheet value

  • DC Grid-No.2 Voltage

    1000 V

    Published datasheet value

  • DC Grid-No.t Voltage

    250 V

    Published datasheet value

  • Peak RF Grid-No.1 Voltage

    280 V

    Published datasheet value

  • DC Plate Current

    11

    Published datasheet value

  • DC Grid-N o.2 Current

    1.3

    Published datasheet value

  • DC Grid-No.1 Current

    1.3

    Published datasheet value

  • Driver Power Output (approx.)

    375

    Published datasheet value

  • Output-Circuit Efficiency lapprox.)

    95

    Published datasheet value

  • Useful Power Output (approx.)

    100000 W

    Published datasheet value

  • RCA Power Tubes", ICE-279A. During shipment the tube

    279

    Published datasheet value

  • ring surrounding the grid-No.1 terminal using four 10-32

    10

    Published datasheet value

  • 6; Remove the wooden mounting plate from the tube by

    6

    Published datasheet value

  • 8. Reattach the wooden mounting plate to the spring sup

    8

    Published datasheet value

  • 3. Set tube down resting on mounting plate

    3

    Published datasheet value

  • 5. Lift tube using the eye-bolts on the mounting plate. It is

    5

    Published datasheet value

  • 1. Visually inspect the coolant separator and tube anode

    1

    Published datasheet value

  • 3. Carefully insert the AJ2196 Plate Coolant Separator into

    3

    Published datasheet value

  • Power Dissipation in kW = 0.264 (GPM) (Tout — Tin)

    264 W

    Published datasheet value

  • plication Guide for RCA Power Tubes" 10E-279

    10

    Published datasheet value

  • Filament, Grid No. 1 and Grid No. 2 (Type 4647)

    2

    Published datasheet value

  • Filament

    15

    Published datasheet value

  • Filament Ground

    15

    Published datasheet value

  • Grid No.1

    17

    Published datasheet value

  • Grid No.2

    15

    Published datasheet value

  • Filament, Grid No. 1 and Grid No. 2 (Type 4648)

    2

    Published datasheet value

  • Filament

    20

    Published datasheet value

  • Filament Ground 2.0

    20

    Published datasheet value

  • Grid No.1

    23

    Published datasheet value

  • Grid No.2

    20

    Published datasheet value

  • FILAMENT TERMINAL d

    8

    Published datasheet value

  • RF GRID No. 1

    1

    Published datasheet value

  • DETAIL OF RF INPUT CATHODE AND RF GRID NO. 1 TERMI

    1

    Published datasheet value

  • NAL, CONTACT SURFACES AND DC GRID NO. 1 TERMINAL

    1

    Published datasheet value