3CW25000A3

Water-cooled ceramic-metal power triode designed primarily for industrial radio-frequency heating, with a 25-kilowatt anode-dissipation class.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 152 A

Description

The Eimac 3CW25,000A3 is a water-cooled, ceramic-metal power triode designed primarily for use in industrial radio-frequency heating services. Its water-cooled anode is rated at 25 kilowatts of plate dissipation with low water flow and pressure drop. Full input of 60 kilowatts is permissable up to 100 megacycles. Plentiful reserve emission is available from its one kilowatt filament. The grid structure is rated at 500 watts making this tube an excellent choice for severe applications. It is also recommended as a grounded grid FM amplifier, a conventional plate- modulated amplifier or as a linear amplifier in new equipment designs.

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: 6.3 V
Nominal heater current: 152 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: 20
Max plate voltage: 10000 V
Max plate dissipation: 25000 W
Max grid dissipation: 500 W
Max cathode current: 6 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 3CW25,000A3 is a water-cooled, ceramic-metal power triode designed
3 a
| The Eimac 3CW25,000A3 is a water-cooled, ceramic-metal power triode designed
Voltage . . . . . . . 6.3 volts
6.3 volts
GeneralCharacteristics | Voltage . . . . . . . 6.3 volts
Current . . . . . . . 152 172 amperes
152 amperes
GeneralCharacteristics | Current . . . . . . . 152 172 amperes
Amplification Factor . . 20
20
GeneralCharacteristics | Amplification Factor . . 20
Frequency for Maximum Rcmngs. C e e e e e e e e e e e e e e e 100 Mc
100 Mc
GeneralCharacteristics | Frequency for Maximum Rcmngs. C e e e e e e e e e e e e e e e 100 Mc

Other

Ceramic-to-Metal Seals . . 250°C
250 °C
| Ceramic-to-Metal Seals . . 250°C
Height 9.4 inches
9.4 inches
| Height 9.4 inches
Diameter 5.0 inches
5 inches
| Diameter 5.0 inches
Net Weight . 12 pounds
12 pounds
| Net Weight . 12 pounds
RF INDUSTRIAL OSCILLATOR DC Plate Voltage . . . . 7000 10,000 volts
7000 volts
TYPICAL OPERATION | RF INDUSTRIAL OSCILLATOR DC Plate Voltage . . . . 7000 10,000 volts
Class-C (Filtered DC Power Supply) DC Plate Current . . . . 6.0 6.0 amps
6 amps
TYPICAL OPERATION | Class-C (Filtered DC Power Supply) DC Plate Current . . . . 6.0 6.0 amps
DC Grid Voltage . . . . -600 —800 volts
-600 volts
TYPICAL OPERATION | DC Grid Voltage . . . . -600 —800 volts
DC PLATE VOLTAGE . . . . . 10,000 VOLTS Peak Positive Grid Voltage . 440 360 volts
10000 VOLTS
MaximumRatings | DC PLATE VOLTAGE . . . . . 10,000 VOLTS Peak Positive Grid Voltage . 440 360 volts
DC PLATE CURRENT . . . . . . 6.0 AMPS Driving Power . . . . . 660 365 watts
6 AMPS
MaximumRatings | DC PLATE CURRENT . . . . . . 6.0 AMPS Driving Power . . . . . 660 365 watts
DC GRID CURRENT . . . . . . . 10 AMP Plate Input Power . . . . 42
10 AMP
MaximumRatings | DC GRID CURRENT . . . . . . . 10 AMP Plate Input Power . . . . 42
PLATE INPUT POWER. . . . . . . 60 Kw Plate Dissipation . . . . 12
60 Kw
MaximumRatings | PLATE INPUT POWER. . . . . . . 60 Kw Plate Dissipation . . . . 12
PLATE DISSIPATION . . . . . . . 25 KW
25 KW
MaximumRatings | PLATE DISSIPATION . . . . . . . 25 KW
Class-C DC Plate Voltage . . . . . 5000 7000 volts
5000 volts
PLATE-MODULATED TYPICAL OPERATION | Class-C DC Plate Voltage . . . . . 5000 7000 volts
DC PLATE VOLTAGE 7000 MAX. VOLTS DC Plate Current . . . . . . 5.0 5.0 amps
7000 VOLTS
MaximumRatings | DC PLATE VOLTAGE 7000 MAX. VOLTS DC Plate Current . . . . . . 5.0 5.0 amps
DC PLATE CURRENT 5.0 MAX. AMPS DC Grid Current . . . . . . 600 600 mA
5 AMPS
MaximumRatings | DC PLATE CURRENT 5.0 MAX. AMPS DC Grid Current . . . . . . 600 600 mA
PLATE DiSSIPATION 16.5 MAX. KW Driving Power . . . . . . 600 750 watts
16.5 KW
MaximumRatings | PLATE DiSSIPATION 16.5 MAX. KW Driving Power . . . . . . 600 750 watts
GRID DISSIPATION 500 MAX. WATTS Plate Output Power . . . . . 17.8 27.5 kW
500 WATTS
MaximumRatings | GRID DISSIPATION 500 MAX. WATTS Plate Output Power . . . . . 17.8 27.5 kW
DC Plate Voltage . . . . . 7000 10000 volts
7000 volts
RADIO-FREQUENCY TYPICAL OPERATION | DC Plate Voltage . . . . . 7000 10000 volts
DC PLATE VOLTAGE 10000 MAX. VOLTS Zero-Sig Plate Current . . . . ' 2.0 2.0 amps
10000 VOLTS
MaximumRatings | DC PLATE VOLTAGE 10000 MAX. VOLTS Zero-Sig Plate Current . . . . ' 2.0 2.0 amps
DC PLATE CURRENT 6.0 MAX. AMPS Max-Sig DC Piate Current . . . 6.0 6.0 amps
6 AMPS
MaximumRatings | DC PLATE CURRENT 6.0 MAX. AMPS Max-Sig DC Piate Current . . . 6.0 6.0 amps
PLATE DISSIPATION 25 MAX. KW Max-Sig DC Grid Current . . . 375 333 mA
25 KW
MaximumRatings | PLATE DISSIPATION 25 MAX. KW Max-Sig DC Grid Current . . . 375 333 mA
GRID DISSIPATION 500 MAX. WATTS Peak RF Grid Voltage . . . . 530 700 volts
500 WATTS
MaximumRatings | GRID DISSIPATION 500 MAX. WATTS Peak RF Grid Voltage . . . . 530 700 volts
* Adjust to give specified zero-signal dc plate current Driving Power . . . . . . 200 240 watts
200 watts
MaximumRatings | * Adjust to give specified zero-signal dc plate current Driving Power . . . . . . 200 240 watts
Plate Qutput Power . . . . . 26.4 41 kW
26.4 kW
MaximumRatings | Plate Qutput Power . . . . . 26.4 41 kW
Filament—The rated filament voltage for the 3CW- service and for Class AB applications. When used as a
3 a
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | Filament—The rated filament voltage for the 3CW- service and for Class AB applications. When used as a
25,000A3 is 6.3 volts. Filament voltage, as measured plate modulated rf amplifier, input is reduced to 7000
25000 volts
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | 25,000A3 is 6.3 volts. Filament voltage, as measured plate modulated rf amplifier, input is reduced to 7000
at the socket, must be maintained at 6.3 volts plus or volts at 5.0 amperes dc. Maximum input may be ex
6.3 volts
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | at the socket, must be maintained at 6.3 volts plus or volts at 5.0 amperes dc. Maximum input may be ex-
operate with more than 0.4 to 0.6 amperes grid current
0.4 amperes
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | operate with more than 0.4 to 0.6 amperes grid current
mum grid dissipation rating is 500 watts. High Frequency Operation—The 3CW25,000A3 is
500 watts
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | mum grid dissipation rating is 500 watts. High Frequency Operation—The 3CW25,000A3 is
usable to 140 Mc. At this frequency, plate voltage must
140 Mc
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | usable to 140 Mc. At this frequency, plate voltage must
Plate Operation—The maximum plate input power be reduced to 7000 volts in class A, B or C service. For
7000 volts
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | Plate Operation—The maximum plate input power be reduced to 7000 volts in class A, B or C service. For
rating is 60 kilowatts at 10,000 volts and 6.0 amperes plate-modulated applications at 140 Mc, plate voltage
60 volts
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | rating is 60 kilowatts at 10,000 volts and 6.0 amperes plate-modulated applications at 140 Mc, plate voltage
de. This rating applies for Class C amplifier or oscillator is reduced to 5500 volts
5500 volts
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | de. This rating applies for Class C amplifier or oscillator is reduced to 5500 volts.
area shown as “V” on the outline drawing. 10 6 0.2
10 V
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | area shown as “V” on the outline drawing. 10 6 0.2
With the tube in the anode-up position the water inlet peratures below the 250°C maximum. Approximately
250 °C
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | With the tube in the anode-up position the water inlet peratures below the 250°C maximum. Approximately
must be limited to 60°C or below, outlet water tem- given here, write to Power Grid Marketing, Eitel
60 °C
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | must be limited to 60°C or below, outlet water tem- given here, write to Power Grid Marketing, Eitel-
perature must not exceed 70°C nor should inlet water McCullough, Inc., 301 Industrial Way, San Carlos,
70 °C
Note: “TYPICAL OPERATION” data are obtained by calculation from published characteristic | perature must not exceed 70°C nor should inlet water McCullough, Inc., 301 Industrial Way, San Carlos,

Data set 02

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

The Eimac [1]
3 W
The Eimac 3CW25,000A3 is a water-cooled, ceramic-metal power triode designed
The Eimac [2]
5000 W
The Eimac 3CW25,000A3 is a water-cooled, ceramic-metal power triode designed
is rated at
25 W
is rated at 25 kilowatts of plate dissipation with low water flow and pressure drop.
Full input of
60 MHz
Full input of 60 kilowatts is permissable up to loo megacycles. Plentiful reserve
emission is available from its one kilowatt filament. The grid structure is rated at
500
emission is available from its one kilowatt filament. The grid structure is rated at 500
Voltage
6.3 V
Voltage . . . 6.3
Current
152 A
Current . . . 152
Frequency for Maximum Ratings
100
Frequency for Maximum Ratings . 100 Mc
Ceramic-to-Metal Seals
250
Ceramic-to-Metal Seals . ....... 250OC
DCplatecurrent [1]
6 A
DCplatecurrent . . . 6.0 6.O amps
DCplatecurrent [2]
6 A
DCplatecurrent . . . 6.0 6.O amps
Class-C (Filtered DC Power Supply) [1]
-600 W
Class-C (Filtered DC Power Supply) -600 -800 volts
Class-C (Filtered DC Power Supply) [2]
-800 W
Class-C (Filtered DC Power Supply) -600 -800 volts
DCGridcurrent [1]
66 A
DCGridcurrent . . . .66 .315
DCGridcurrent [2]
315 A
DCGridcurrent . . . .66 .315
DC PLATE VOLTAGE [1]
10000 V
DC PLATE VOLTAGE ..... 10,000 VOLTS Peak Positive Grid Voltage 440 360
DC PLATE VOLTAGE [2]
440 V
DC PLATE VOLTAGE ..... 10,000 VOLTS Peak Positive Grid Voltage 440 360
DC PLATE VOLTAGE [3]
360 V
DC PLATE VOLTAGE ..... 10,000 VOLTS Peak Positive Grid Voltage 440 360
DC PLATE CURRENT [1]
6 A
DC PLATE CURRENT ...... 6.O AMPS Driving power .... 660 365
DC PLATE CURRENT [2]
660 A
DC PLATE CURRENT ...... 6.O AMPS Driving power .... 660 365
DC PLATE CURRENT [3]
365 A
DC PLATE CURRENT ...... 6.O AMPS Driving power .... 660 365
DC GRID CURRENT [1]
1 A
DC GRID CURRENT ....... 1.O AMP Platelnputpower. . . 4260
DC GRID CURRENT [2]
4260 A
DC GRID CURRENT ....... 1.O AMP Platelnputpower. . . 4260
Plate Dissipation
1218 W
PlateDissipation . . . 1218
PLATE INPUT POWER
60 kW
PLATE INPUT POWER ....... 60 KW
Plateoutputpower
3042 W
Plateoutputpower . . 3042
Class-C DC plate voltage [1]
0 V
Class-C DC plate voltage . 000 7000 volts
Class-C DC plate voltage [2]
7000 V
Class-C DC plate voltage . 000 7000 volts
MAXIMUM RATINGS DCGrid voltage [1]
600 V
MAXIMUM RATINGS DCGrid voltage. . 600 -820 volts
MAXIMUM RATINGS DCGrid voltage [2]
-820 V
MAXIMUM RATINGS DCGrid voltage. . 600 -820 volts
DC PLATE VOLTAGE [1]
7000 V
DC PLATE VOLTAGE 7000 MAX. VOLTS DC platecurrent. . 5.0 5.0 amps
DC PLATE VOLTAGE [2]
5 V
DC PLATE VOLTAGE 7000 MAX. VOLTS DC platecurrent. . 5.0 5.0 amps
DC PLATE VOLTAGE [3]
5 V
DC PLATE VOLTAGE 7000 MAX. VOLTS DC platecurrent. . 5.0 5.0 amps
DC PLATE CURRENT [1]
5 mA
DC PLATE CURRENT 5.0 MA\X. ANIPS DCGridcurrent . . 600 600 rnA
DC PLATE CURRENT [2]
600 mA
DC PLATE CURRENT 5.0 MA\X. ANIPS DCGridcurrent . . 600 600 rnA
DC PLATE CURRENT [3]
600 mA
DC PLATE CURRENT 5.0 MA\X. ANIPS DCGridcurrent . . 600 600 rnA
PLATE DISSIPATION \ [1]
6.5 W
PLATE DISSIPATION \6.5 MA:X. K:W Driving Power . . 600 750 watts
PLATE DISSIPATION \ [2]
600 W
PLATE DISSIPATION \6.5 MA:X. K:W Driving Power . . 600 750 watts
PLATE DISSIPATION \ [3]
750 W
PLATE DISSIPATION \6.5 MA:X. K:W Driving Power . . 600 750 watts
GRID DISSIPATION [1]
5 kW
GRID DISSIPATION 5CJ0 MA:X. WA:ITS Plate Output Power . 17.8 27.5 kw
GRID DISSIPATION [2]
17.8 kW
GRID DISSIPATION 5CJ0 MA:X. WA:ITS Plate Output Power . 17.8 27.5 kw
GRID DISSIPATION [3]
27.5 kW
GRID DISSIPATION 5CJ0 MA:X. WA:ITS Plate Output Power . 17.8 27.5 kw
LINEAR AMPLIFIER Class-A8 [1]
2 V
LINEAR AMPLIFIER Class-A82 DC Plate Voltage 7000 10000 volts
LINEAR AMPLIFIER Class-A8 [2]
7000 V
LINEAR AMPLIFIER Class-A82 DC Plate Voltage 7000 10000 volts
LINEAR AMPLIFIER Class-A8 [3]
10000 V
LINEAR AMPLIFIER Class-A82 DC Plate Voltage 7000 10000 volts
MAXIMUM RATINGS DC Grid Voltage* [1]
-250 V
MAXIMUM RATINGS DC Grid Voltage* -250 -400 volts
MAXIMUM RATINGS DC Grid Voltage* [2]
-400 V
MAXIMUM RATINGS DC Grid Voltage* -250 -400 volts
DC PLATE VOLTAGE [1]
10000 V
DC PLATE VOLTAGE 10000 MAX. VOLTS Zero-Sig Plate Current . 2.0 2.0 amps
DC PLATE VOLTAGE [2]
2 V
DC PLATE VOLTAGE 10000 MAX. VOLTS Zero-Sig Plate Current . 2.0 2.0 amps
DC PLATE VOLTAGE [3]
2 V
DC PLATE VOLTAGE 10000 MAX. VOLTS Zero-Sig Plate Current . 2.0 2.0 amps
DC PLATE CURRENT [1]
6 mA
DC PLATE CURRENT 6.0 MA:X. A:N:PS Max-Sig DC Plate Current 6.0 6.0 amps
DC PLATE CURRENT [2]
6 mA
DC PLATE CURRENT 6.0 MA:X. A:N:PS Max-Sig DC Plate Current 6.0 6.0 amps
DC PLATE CURRENT [3]
6 mA
DC PLATE CURRENT 6.0 MA:X. A:N:PS Max-Sig DC Plate Current 6.0 6.0 amps
PLATE DISSIPATION [1]
25 mA
PLATE DISSIPATION 25 MA`X. K:W Max-Sig DC Grid Current 375 333 rnA
PLATE DISSIPATION [2]
375 mA
PLATE DISSIPATION 25 MA`X. K:W Max-Sig DC Grid Current 375 333 rnA
PLATE DISSIPATION [3]
333 mA
PLATE DISSIPATION 25 MA`X. K:W Max-Sig DC Grid Current 375 333 rnA
GRID DISSIPATloN [1]
500 V
GRID DISSIPATloN .... 500 MA`X. WA:ITS Peak RF Grid Voltage . 530 700 volts
GRID DISSIPATloN [2]
530 V
GRID DISSIPATloN .... 500 MA`X. WA:ITS Peak RF Grid Voltage . 530 700 volts