Data set 01
1962 Eimac
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Amplification Factor
19 to 26
Frequency for Maximum Ratings
30 MHz
Other
Maximum DC Plate Current
2.5 A
ClassB
Power - Triode (over 1000V 100W) ·Triode
3CX2500F3
Forced-air-cooled medium-mu power triode for RF and audio-frequency amplifier or modulator service. Its 2.5 kW plate-dissipation rating and several-kilovolt operation suit substantial transmitting and industrial power stages.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 7.5 V / 50.5 A
Description
Forced-air-cooled medium-mu power triode for RF and audio-frequency amplifier/modulator 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
- 50.5 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
- 0.02 S
- Amplification factor
- 20
- Max plate voltage
- 6000 V
- Max plate dissipation
- 2500 W
- Max grid dissipation
- 150 W
- Max cathode current
- 2.5 A
Highest applicable published rating promoted; service-specific CW, RF, audio, industrial, and pulse limits retained as parameter rows.
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 02
1965 Eimac Tube Manual
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristic
Heater/filament voltage
7.5 V
Heater/filament current
50.5 A
Amplification factor
20
Transconductance
20000 uS
Capacitance
Input/grid-cathode capacitance
29.2 pF
Output/plate-cathode capacitance
40.2 pF
Feedback/grid-plate capacitance
1.2 pF
Other
Maximum plate voltage
6000 V
Maximum plate dissipation
2500 W
Maximum grid dissipation
150 W
Maximum plate/cathode current
2.5 A
Frequency for maximum ratings
30 MHz
Typical RF plate voltage
6000 V
ClassC
Typical RF plate current
2.08 A
ClassC
Typical RF output power
10000 W
ClassC
AF maximum-signal output, two tubes
13000 W
ClassB;TwoTubes