F9C30

Power transmitting triode intended for RF amplification, oscillation, or modulation. Manufacturer documentation emphasizes professional transmitter or industrial RF service with substantial plate voltage, current, and output capability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 15 V / 135 A

Description

Federal F-9C30 three-electrode high-power transmitting tube for RF amplification, oscillator, and Class B modulator service. It uses a thoriated-tungsten multistrand filament and a water-cooled anode.

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: 15 V
Nominal heater current: 135 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

Amplification factor: 40.5
Max plate voltage: 15000 V
Max plate dissipation: 40000 W
Max cathode current: 45 A

Published ratings/characteristics semantically audited; condition-specific operating values preserved in 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 01

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Amplification factor
40.5

Other

Maximum plate voltage
15000 V
Maximum plate dissipation
40000 W
Peak cathode current
45 A
Maximum/full-ratings frequency
20 MHz

Capacitance

Grid-plate capacitance
35 pF
Grid-filament capacitance
46 pF
Plate-filament capacitance
5.6 pF

Construction

Cooling method
Water

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Amplification factor
40.5
Peak cathode current
45 A

Other

Filament starting current
200 A
Maximum
Filament cold resistance
0.019 ohm
DC plate voltage
15000 V
ClassB Audio
Maximum signal DC plate current
5 A
ClassB Audio
Maximum signal plate input
50 kW
ClassB Audio
Plate dissipation
30 kW
ClassB Audio
DC plate voltage
12000 V
ClassC PlateModulated
DC grid voltage
-3000 V
ClassC PlateModulated
DC plate current
4.5 A
ClassC PlateModulated
Plate dissipation
30 kW
ClassC PlateModulated
DC plate voltage
15000 V
ClassC RF
DC grid voltage
-3000 V
ClassC RF
DC plate current
8 A
ClassC RF
Plate input
120 kW
ClassC RF
Plate dissipation
40 kW
ClassC RF
Typical power output
70.5 kW
ClassC RF

Capacitance

Grid-plate capacitance
35 pF
Grid-filament capacitance
46 pF
Plate-filament capacitance
5.6 pF