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
8251
All-ceramic-and-metal medium-mu transmitting triode rated in the 2.5-kW power class.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 7.5 V / 53 A
Description
The EIMAC 3CX2500F3 is an all-ceramic-and-metal medium-mu forced-air-cooled external-anode transmitting triode for amplifier, oscillator and modulator service below 30 MHz.
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
- 53 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
Alias record duplicated from the same published 3X2500F3 source.
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
Other
Grid-Plate Capacitance
20 pF
Grid-Filament Capacitance
31 pF
Plate-Filament Capacitance
1.5 pF
Transconductance
0.02 A/V
Frequency Maximum
30 MHz
Typical RF Output Power
7500 W
FCC Plate-Modulated Carrier Rating
5000 W
FCC Linear Carrier Rating
1250 W