Power - Triode (over 1000V 100W) ·Triode
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.
The EIMAC 3CX15000A3 is a air-cooled medium-mu ceramic/metal power triode for industrial rf heating, fm, and linear-amplifier service.
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Maximum ratings promoted from the printed service-rating tables; typical operating values are preserved as parameters.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Grid-Filament — — — — — — — —« — - _— 55 pF
55 pF
Plate-Filament, max, — — — — — — — — — 1.4 pF
1.4 pF
Grid-Plate - — = — = — = = = — — — 34 pF
34 pF
Grid-Filament — — = = — - — — 60 pF
60 pF
Grid-Plate - — — — = — — — — 38 pF
38 pF
Maximum plate voltage
8000 V
Maximum plate/cathode current
6 A
Maximum plate dissipation
15000 W
Maximum grid dissipation
500 W
Data set 02
Published operating points and test conditions from this source.
Amplification factor
20
Heater/filament voltage
6.3 V
Heater/filament current
160 A
Maximum plate voltage
8000 V
Maximum plate dissipation
15000 W
Maximum grid dissipation
500 W
Maximum cathode/plate current
6 A
Frequency for maximum ratings
100 MHz
Class-C maximum plate voltage
8000 V
ClassC
Plate-modulated maximum plate voltage
6500 V
PlateModulated
Recommended maximum grid current
1 A
Input/grid-filament capacitance
55 to 55 pF
Output/plate-filament capacitance
1.4 to 1.4 pF
Feedback/grid-plate capacitance
34 to 34 pF
Cooling
Forced air
Data set 03
Published operating points and test conditions from this source.
Amplification factor
20
Heater/filament voltage
6.3 V
Heater/filament current
160 A
Maximum plate voltage
8000 V
Maximum plate dissipation
15000 W
Maximum grid dissipation
500 W
Maximum cathode/plate current
6 A
Frequency for maximum ratings
100 MHz
Class-C maximum plate voltage
8000 V
ClassC
Plate-modulated maximum plate voltage
6500 V
PlateModulated
Recommended maximum grid current
1 A
Input/grid-filament capacitance
55 to 55 pF
Output/plate-filament capacitance
1.4 to 1.4 pF
Feedback/grid-plate capacitance
34 to 34 pF
Cooling
Forced air
Data set 04
Published operating points and test conditions from this source.
Current @
7.5 V
General
Input
55 pF
General
Output
34 pF
General
Feedback
1.4 pF
General
Input
55 pF
General
Output
1.4 pF
General
Feedback
34 pF
General
Maximum frequency for full ratings (CW)
100 MHz
General
DC plate voltage
8000 V
Maximum Ratings
DC plate current
6 A
Maximum Ratings
Plate dissipation
15000 W
Maximum Ratings
Grid dissipation
500 W
Maximum Ratings
DC plate voltage
7000 V
Typical operation
Zero-signal DC plate current
1.5 A
Typical operation
Single-tone DC plate current
4.8 A
Typical operation
Zero-signal DC grid voltage
-270 V
Typical operation
Max DC grid current
400 mA
Typical operation
Peak RF grid voltage
540 V
Typical operation
Peak driving power
215 W
Typical operation
Single-tone plate output power
23000 W
Typical operation
Resonant load impedance
730 ohms
Typical operation
DC plate voltage
8000 V
Maximum ratings (per tube)
DC plate current
6 A
Maximum ratings (per tube)
Plate dissipation
15000 W
Maximum ratings (per tube)
Grid dissipation
500 W
Maximum ratings (per tube)
DC plate voltage
7000 V
Typical operation
DC grid voltage
-600 V
Typical operation
Maximum-signal DC plate current
6 A
Typical operation
Maximum-signal DC grid current
660 mA
Typical operation
Peak AF grid voltage
1040 V
Typical operation
Driving power
660 W
Typical operation
Plate input power
42000 W
Typical operation
Plate output power
30000 W
Typical operation
Plate dissipation
12000 W
Typical operation
Resonant load impedance
600 ohms
Typical operation
may be exceeded. Plate overcurrent protec- below
225 ˚C
periods such as during tuning. Over-current Vdc Class A, B, or C service. The
tion should be provided to remove plate perature of
40 ˚C
periods such as during tuning. Over-current Vdc Class A, B, or C service. The