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Power - Triode (over 1000V 100W) ·Triode

3CW20000H7

Water-cooled ceramic-metal industrial power triode for high-power RF generation, amplification, or modulation. Its manufacturer ratings emphasize continuous transmitting duty with high plate dissipation and substantial power handling.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 7.5 V / 100 A

Description

The EIMAC 3CW20000H7 is a water-cooled high-mu ceramic/metal power triode for regulator, switching, pulse, rf, and audio service.

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: 7.5 V
Nominal heater current: 100 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

Triode

X-ray radiationInterelectrode capacitances

Amplification factor: 200
Max plate voltage: 20000 V
Max plate dissipation: 20000 W
Max grid dissipation: 500 W
Max cathode current: 40 A

Single triode section; promoted values mapped from printed General Characteristics and Maximum Ratings headings.

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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

The EIMAC 3CW20,000H7 is a ceramic/metal power
3 a
| The EIMAC 3CW20,000H7 is a ceramic/metal power
The anode dissipation rating is 20,000 watts with water
20000 watts
| The anode dissipation rating is 20,000 watts with water
Voltage
7.5 V
GeneralCharacteristics | Voltage . . ... iininiinnnnnns 7.5+ 0.4 V
Current, at 7.5V
7.5 v
GeneralCharacteristics | Current, at 7.5V . ... ... v 100 A
Amplification Factor (Average)
200
GeneralCharacteristics | Amplification Factor (Average) ......... 200
L0 1 59 pF
1 pF
GeneralCharacteristics | L0 1 59 pF
Cout
0.2 pF
GeneralCharacteristics | Cout .. vvvii ittt 0.2 pF
0 o T 36 pF
0 pF
GeneralCharacteristics | 0 o T 36 pF
Frequency of Maximum Rating (CW)
110 MHz
GeneralCharacteristics | Frequency of Maximum Rating (CW). ... ... 110 MHz
2. Capacitance values are for a cold tube as measured in a special
2 a
GeneralCharacteristics | 2. Capacitance values are for a cold tube as measured in a special

Other

(Effective 5-15-74) © by Varian Printed in U.S.A
5 A
| (Effective 5-15-74) © by Varian Printed in U.S.A.
Envelope & Ceramic/Metal Seals
250 °C
| Envelope & Ceramic/Metal Seals . .................... e 250°C
Net Weight (Approximate)
10.6 v
| Net Weight (Approximate) . . . ...... ce e e «v.... 10.6 Ibs: 4.8 kg
DC PLATE CURRENT
7.5 AMPERES
MaximumRatings | DC PLATE CURRENT .. ........ 7.5 AMPERES GRID DISSIPATION . .......... 500 WATTS
PULSE PLATE CURRENT
40 AMPERES
MaximumRatings | PULSE PLATE CURRENT . .. .... 40 AMPERES GRID DISSIPATION . . ... ... ... 500 WATTS
DC PLATE VOLTAGE
7000 VOLTS
RADIO FREQUENCY LINEAR AMPLIFIER TYPICAL OPERATION. Single-Tone Conditions | DC PLATE VOLTAGE . .. ...... 7000 VOLTS B"jt;nsg'?;‘;'ej;dcecu"f”‘f ----- 0';‘5 1-3(2’ adc
DC PLATE CURRENT
5 AMPERES
RADIO FREQUENCY LINEAR AMPLIFIER TYPICAL OPERATION. Single-Tone Conditions | DC PLATE CURRENT ... ...... 5.0 AMPERES Resonant Load mpedance . . . . . . 1020 745 Q
PLATE DISSIPATION
20 W
RADIO FREQUENCY LINEAR AMPLIFIER TYPICAL OPERATION. Single-Tone Conditions | PLATE DISSIPATION . ... ..... 20 KILOWATTS Max. Signal Driving Power1, . . ., 885 1540 W
GRID DISSIPATION
500 WATTS
RADIO FREQUENCY LINEAR AMPLIFIER TYPICAL OPERATION. Single-Tone Conditions | GRID DISSIPATION ... ...... 500 WATTS Peak Envelope Plate
Output Power .,
17.7 kW
RADIO FREQUENCY LINEAR AMPLIFIER TYPICAL OPERATION. Single-Tone Conditions | Output Power ., ... ........ 17.7 24.2 kW
1. Approximate value. Power Gainl
1
RADIO FREQUENCY LINEAR AMPLIFIER TYPICAL OPERATION. Single-Tone Conditions | 1. Approximate value. Power Gainl ... . .......... 20.0 15.7 times
DC PLATE VOLTAGE
7000 VOLTS
MaximumRatings | DC PLATE VOLTAGE ......... 7000 VOLTS Max, Signal Plate Current . . . . . . 10.0 10.0 Adc
DC PLATE CURRENT
5 AMPERES
MaximumRatings | DC PLATE CURRENT ... ...... 5.0 AMPERES Max, Signal Grid Current1. . . . . 1.2 2.1 Adc
PLATE DISSIPATION
20 W
MaximumRatings | PLATE DISSIPATION . ........ 20 KILOWATTS Driving Power 1., . . ... .. .. .. 290 560 W
GRID DISSIPATION
500 WATTS
MaximumRatings | GRID DISSIPATION .. ....... 500 WATTS Peak Audio Driving1
A Load Resistance, plate-to-plate
1030 A
MaximumRatings | A Load Resistance, plate-to-plate .. 1030 1520
1. Approximate value. Max, Signal Plate Output Powerl. . 31.0 47.7 kW
1 kW
MaximumRatings | 1. Approximate value. Max, Signal Plate Output Powerl. . 31.0 47.7 kW
DC PLATE VOLTAGE
7000 VOLTS
MaximumRatings | DC PLATE VOLTAGE . . . ... ... 7000 VOLTS Plgte Curren: ................... 2.4 Adc
DC PLATE CURRENT
5 AMPERES
MaximumRatings | DC PLATE CURRENT .. ....... 5.0 AMPERES Gl'ld purrent ................... 0.25 Adc
GRID DISSIPATION
500 WATTS
MaximumRatings | GRID DISSIPATION . ........ 500 WATTS Peak Driving Voltage2............. 310 v
DrivingPower1, . .,
330 W
MaximumRatings | DrivingPower1, . ., . ... ... ....... 330 W
1. Approximate value. Plate Output Power1
1 W
MaximumRatings | 1. Approximate value. Plate Output Power1. . . . . ... . ... ... 5650 W
3CW20,000H7 @a
3 a
MaximumRatings | 3CW20,000H7 @a
PLATE DISSIPATION
20 v
MaximumRatings | PLATE DISSIPATION . ....... 20 KILOWATTS Peak rf Grid Voltage . ........ 510 555 v
GRID DISSIPATION
500 WATTS
MaximumRatings | GRID DISSIPATION . . ....... 500 WATTS Grid Driving Power . ........ 420 530 W
Plate Output Power1
14 kW
MaximumRatings | Plate Output Power1 . ... ..... 14 21.3 kW

Data set 02

1975 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Amplification factor
200
Heater/filament voltage
7.5 V
Heater/filament current
100 A

Other

Maximum plate voltage
20000 V
Maximum plate dissipation
20000 W
Maximum grid dissipation
500 W
Maximum cathode/plate current
40 A
Frequency for maximum ratings
110 MHz
Pulse-service plate voltage
20000 V
Pulse
Pulse plate current
40 A
Pulse

Capacitance

Input/grid-filament capacitance
53 to 65 pF
Output/plate-filament capacitance
0.3 to 0.3 pF
Feedback/grid-plate capacitance
32 to 40 pF

Construction

Cooling
Water and forced air

Data set 03

1976 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Amplification factor
200
Heater/filament voltage
7.5 V
Heater/filament current
100 A

Other

Maximum plate voltage
20000 V
Maximum plate dissipation
20000 W
Maximum grid dissipation
500 W
Maximum cathode/plate current
40 A
Frequency for maximum ratings
110 MHz
Pulse-service plate voltage
20000 V
Pulse
Pulse plate current
40 A
Pulse

Capacitance

Input/grid-filament capacitance
53 to 65 pF
Output/plate-filament capacitance
0.3 to 0.3 pF
Feedback/grid-plate capacitance
32 to 40 pF

Construction

Cooling
Water and forced air

Data set 04

199X Svetlana

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

area, giving superior VHF performance to
200 MHz
T cooled power triode designed for use in zero-bias class B RF, audio amplifier,
Current @
7.5 V
T cooled power triode designed for use in zero-bias class B RF, audio amplifier,
Grid to filament
59 pF
T cooled power triode designed for use in zero-bias class B RF, audio amplifier,
Grid to anode
36 pF
T cooled power triode designed for use in zero-bias class B RF, audio amplifier,
Filament to anode
0.2 pF
T cooled power triode designed for use in zero-bias class B RF, audio amplifier,
Maximum frequency for full ratings (CW)
200 MHz
T cooled power triode designed for use in zero-bias class B RF, audio amplifier,

Other

DC plate voltage
7000 V
Maximum Ratings
DC plate current
5 A
Maximum Ratings
Plate dissipation
20000 W
Maximum Ratings
Grid dissipation
500 W
Maximum Ratings
DC plate voltage 7000
7000 V
Typical Operation Grid Current - Amperes
Zero-signal DC plate current* 0.60
600 mA
Typical Operation Grid Current - Amperes
Single-tone DC plate current 3.72
5 A
Typical Operation Grid Current - Amperes
Grid bias 0
0 V
Typical Operation Grid Current - Amperes
Single-tone DC grid current* 0.71
1 A
Typical Operation Grid Current - Amperes
Peak driving power 885
1540 W
Typical Operation Grid Current - Amperes
Single-tone plate output power 17.7
24200 W
Typical Operation Grid Current - Amperes
Resonant load impedence 1020
745 Ohms
Typical Operation Grid Current - Amperes
Driving impedance 35
32 Ohms
Typical Operation Grid Current - Amperes
DC plate voltage
7000 V
Maximum Ratings 0
DC plate current
4 A
Maximum Ratings 0
Plate dissipation
20000 W
Maximum Ratings 0
Grid dissipation
500 W
Maximum Ratings 0
DC plate voltage 5000
7000 V
Typical Operation
DC grid voltage -210
-230 V
Typical Operation
DC plate current 4.0
4 A
Typical Operation
DC grid current* 0.84
775 mA
Typical Operation
Peak RF grid voltage* 510
555 V
Typical Operation
Driving power 420
530 W
Typical Operation
Plate output power 14.0
21300 W
Typical Operation
DC plate voltage
7000 V
Maximum ratings (per tube)
DC plate current
5 A
Maximum ratings (per tube)
Grid Voltage =
400 V
Maximum ratings (per tube)
Plate dissipation
20000 W
Maximum ratings (per tube)
Grid dissipation
500 W
Maximum ratings (per tube)
DC grid voltage 0
0 V
Typical Operation (two tubes, sinusoidal waveform) 5 200