Power - Triode ·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.
8250/3CX100F5 26.5-V-heater planar UHF triode.
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
Promoted fields populated from published ratings/characteristics; additional published values retained in TUBE_SECTION_PARAMETER.
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.
Heater Current
200 mA to 240 mA
Grid-Cathode Capacitance
5.6 to 7 pF
Grid-Plate Capacitance
1.95 to 2.15 pF
Plate-Cathode Capacitance Maximum
0.035 pF
Frequency for Maximum Ratings
2.5 GHz
Maximum DC Plate Current
125 mA
Typical Useful Output
9.5 W
Frequency=2900MHz
Data set 02
Published operating points and test conditions from this source.
Heater/filament voltage
26.5 V
Heater/filament current
240 mA
Amplification factor
100
Transconductance
25000 uS
Input/grid-cathode capacitance
5.6 pF
Output/plate-cathode capacitance
7 pF
Feedback/grid-plate capacitance
0.35 pF
Maximum plate voltage
3500 V
Maximum plate dissipation
100 W
Maximum grid dissipation
2 W
Maximum plate/cathode current
4.8 A
Frequency for maximum ratings
2500 MHz
CW plate voltage
1000 V
CW
Pulse peak plate voltage
3500 V
Pulse
Pulse cathode current
4.8 A
Pulse
Useful output at 500 MHz
27 W
500MHz
Useful output at 2900 MHz
9.5 W
2900MHz