Power - Beam (NOT sweep) (over 1000V 100W) ·BeamPower
26.5-volt-heater variant of the forced-air-cooled 7203/4CX250B radial-beam transmitting tetrode for high-frequency RF power service.
Printed 26.5-V-heater variant of the 7203/4CX250B forced-air-cooled ceramic-metal beam-power tetrode.
Small-button Noval 9-contact
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
forced-air-cooled beam-power tube (alias of 4CX250F)
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 or filament voltage
26.5 V
Published nominal value
Heater or filament current
580 mA
Published nominal/aggregate value
Maximum plate dissipation
250 W
Published maximum rating
Useful RF power output
250 W
Class-C service
Maximum frequency
500 MHz
Published
Data set 02
Published operating points and test conditions from this source.
Maximum DC Plate Voltage
2000 V
Forced-air-cooled RF service
Maximum DC Screen Voltage
400 V
Forced-air-cooled RF service
Plate Dissipation
250 W
Forced-air-cooled RF service
Screen Input
12 W
Forced-air-cooled RF service
Typical DC Plate Voltage
2000 V
Forced-air-cooled RF service
Typical DC Screen Voltage
350 V
Forced-air-cooled RF service
Useful Power Output
225 W
Forced-air-cooled RF service
Mu Factor, Screen to Control Grid
5
Forced-air-cooled RF service
Grid-No.1 to Plate Capacitance
0.06 pF
Forced-air-cooled RF service
Grid-No.1 to Cathode/Screen/Heater Capacitance
16 pF
Forced-air-cooled RF service
Plate to Cathode/Screen/Heater Capacitance
4.4 pF
Forced-air-cooled RF service