Alternatives & variations Download PDF datasheet

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

3CX10000A7

Ceramic-metal industrial power triode designed for high-power RF amplifier, oscillator, or modulator service. Manufacturer data emphasize transmitting duty, substantial plate dissipation, and the cooling provisions required for continuous professional operation.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

Coaxial metal-ceramic power triode, forced-air-cooled, intended to be used as a zero-bias class-B amplifier in audio or radio-frequency applications up to 25 kW power output.

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

Transconductance: 0.055 S
Amplification factor: 200
Max plate voltage: 7000 V
Max plate dissipation: 12000 W
Max grid dissipation: 500 W
Max cathode current: 5 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

Other

The EIMAC [1]
8160
The EIMAC 8160/3CX10,000A7 is a ceramic and metal power triode
The EIMAC [2]
3
The EIMAC 8160/3CX10,000A7 is a ceramic and metal power triode
The EIMAC [3]
0
The EIMAC 8160/3CX10,000A7 is a ceramic and metal power triode
Amplification Factor (Nominal) .. ... .o iii ittt ittt
200
Amplification Factor (Nominal) .. ... .o iii ittt ittt 200
Frequency for Maximum Ratings. ... .. ..o ittt i ittt iiii i iii e,
160 MHz
Frequency for Maximum Ratings. ... .. ..o ittt i ittt iiii i iii e, 160 MHz
Published value
2
2. Capacitance values are for a cold tube as measured in a shielded fixture in accordance with Electronic Industries
DC Plate Voltage [1]
7000
DC Plate Voltage . .......... 7000 7000
DC Plate Voltage [2]
7000
DC Plate Voltage . .......... 7000 7000
MAXIMUM RATINGS Zero-Signal DC Plate Current1 [1]
0.6
MAXIMUM RATINGS Zero-Signal DC Plate Current1 . . . 0.60 0.60
MAXIMUM RATINGS Zero-Signal DC Plate Current1 [2]
0.6
MAXIMUM RATINGS Zero-Signal DC Plate Current1 . . . 0.60 0.60
Max-Signal DC Plate Current , [1]
3.72
Max-Signal DC Plate Current , . . . 3.72 5.00
Max-Signal DC Plate Current , [2]
5
Max-Signal DC Plate Current , . . . 3.72 5.00
DC PLATE VOLTAGE [1]
8000 V
DC PLATE VOLTAGE ......... 8000 VOLTS Max-Signal DC Grid Current . , . . 0.71 1.00
DC PLATE VOLTAGE [2]
0.71 V
DC PLATE VOLTAGE ......... 8000 VOLTS Max-Signal DC Grid Current . , . . 0.71 1.00
DC PLATE VOLTAGE [3]
1 V
DC PLATE VOLTAGE ......... 8000 VOLTS Max-Signal DC Grid Current . , . . 0.71 1.00
DCPLATECURRENT [1]
5 A
DCPLATECURRENT. .. ....... 5.0 AMPERES Driving Impedance . ......... 35 32
DCPLATECURRENT [2]
35 A
DCPLATECURRENT. .. ....... 5.0 AMPERES Driving Impedance . ......... 35 32
DCPLATECURRENT [3]
32 A
DCPLATECURRENT. .. ....... 5.0 AMPERES Driving Impedance . ......... 35 32
PLATE DISSIPATION [1]
12 kW
PLATE DISSIPATION . . . .. .. ... 12 KILOWATTS Resonant Load Impedance . ., ... 1020 745
PLATE DISSIPATION [2]
1020 kW
PLATE DISSIPATION . . . .. .. ... 12 KILOWATTS Resonant Load Impedance . ., ... 1020 745
PLATE DISSIPATION [3]
745 kW
PLATE DISSIPATION . . . .. .. ... 12 KILOWATTS Resonant Load Impedance . ., ... 1020 745
GRID DISSIPATION [1]
500 W
GRID DISSIPATION .......... 500 WATTS Max-Signal Driving Power . . .. .. 885 1540
GRID DISSIPATION [2]
885 W
GRID DISSIPATION .......... 500 WATTS Max-Signal Driving Power . . .. .. 885 1540
GRID DISSIPATION [3]
1540 W
GRID DISSIPATION .......... 500 WATTS Max-Signal Driving Power . . .. .. 885 1540
Peak Envelope Plate Output Power [1]
17.7
Peak Envelope Plate Output Power. 17.7 24,2
Peak Envelope Plate Output Power [2]
242
Peak Envelope Plate Output Power. 17.7 24,2

Data set 02

1963 Siemens

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Transconductance
55000 µS
Transconductance
55 mA/V mA/V

Other

Heater voltage
7,5 V V
Heater current
≈ 100 A A
Frequency
160 MHz MHz
Anode voltage (dc)
6,5 kV kV
Grid voltage (dc)
– 500 V V
Anode current (dc)
3,0 A A
Anode dissipation
10 kW kW
Grid dissipation
500 W W
Frequency
≤ 30 MHz MHz
Carrier power
11,9 kW kW
Anode voltage (dc)
5,0 kV kV
Grid bias (dc)
– 200 V V
Peak grid voltage (ac)
490 V V
Anode current (dc)
3,0 A A
Grid current (dc)
0,8 A A
Anode input power
15 kW A
Drive power
380 W W
Anode dissipation
3,1 kW kW
Grid dissipation
220 W W
Efficiency
79 %

Capacitance

Cathode/grid
≈ 59 pF pF
Cathode/anode
≈ 0,2 pF pF
Grid/anode
≈ 36 pF pF
Transmitter Triode
2015 CL

Data set 03

1975 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Grid-Filament Capacitance
59 pF
Grid-Plate Capacitance
36 pF
Plate-Filament Capacitance
0.2 pF
Frequency Maximum
160 MHz
RF Linear Plate Voltage Maximum
8000 V
RF Linear Plate Current Maximum
5 A
Class-C Plate Current Maximum
4 A
Plate-Modulated RF Plate Voltage Maximum
6500 V
Plate-Modulated RF Plate Current Maximum
3 A
Typical Peak Envelope Output Power
24.2 kW
GroundedGrid;ClassB
Typical AF Output Power
47.7 kW
TwoTubes

Data set 04

1976 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Grid-Filament Capacitance
59 pF
Grid-Plate Capacitance
36 pF
Plate-Filament Capacitance
0.2 pF
Frequency Maximum
160 MHz
RF Linear Plate Voltage Maximum
8000 V
RF Linear Plate Current Maximum
5 A
Class-C Plate Current Maximum
4 A
Plate-Modulated RF Plate Voltage Maximum
6500 V
Plate-Modulated RF Plate Current Maximum
3 A
Typical Peak Envelope Output Power
24.2 kW
GroundedGrid;ClassB
Typical AF Output Power
47.7 kW
TwoTubes

Data set 05

199X Svetlana

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Current @
7.5 V
zero-bias, class B RF or audio amplifiers. A
Input
59 pF
zero-bias, class B RF or audio amplifiers. A
Output
36 pF
zero-bias, class B RF or audio amplifiers. A
Feedback
0.2 pF
zero-bias, class B RF or audio amplifiers. A
Input
59 pF
zero-bias, class B RF or audio amplifiers. A
Output
0.2 pF
zero-bias, class B RF or audio amplifiers. A
Feedback
36 pF
zero-bias, class B RF or audio amplifiers. A
Maximum frequency for full ratings (CW)
160 MHz
zero-bias, class B RF or audio amplifiers. A

Other

DC plate voltage
10000 V
Maximum Ratings
DC plate current
5 A
Maximum Ratings
Plate dissipation
12000 W
Maximum Ratings
Grid dissipation
500 W
Maximum Ratings
DC plate voltage 7000
7000 V
Typical operation
Zero-signal DC plate current* 0.60
600 mA
Typical operation
Single-tone DC plate current 3.72
5 A
Typical operation
Grid bias 0
0 V
Typical operation
Single-tone DC grid current* 0.71
1 A
Typical operation
Peak driving power 885
1540 W
Typical operation
Single-tone plate output power 17.7
24200 W
Typical operation
Resonant load impedance 1020
745 Ohms
Typical operation
Driving impedance 35
32 Ohms
Typical operation
DC plate voltage
10000 V
Maximum Ratings
DC plate current
4 A
Maximum Ratings
Plate dissipation
10000 W
Maximum Ratings
Grid dissipation
500 W
Maximum Ratings
DC plate voltage
7600 V
Typical operation