F6800

High-power ITT transmitting triode for Class C RF amplifier and oscillator service. Approximately 20 kW plate dissipation and 15 kV capability support tens of kilowatts of typical RF output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 7.5 V / 107 A

Description

Three-electrode industrial oscillator tube with a water-cooled anode capable of 20 kW dissipation; thoriated-tungsten filament. Full ratings apply to 22.5 MHz and reduced ratings permit operation to 50 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: 107 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: 19.5
Max plate voltage: 15000 V
Max plate dissipation: 20000 W

Published maximum ratings and characteristics audited; remaining numeric data retained densely in parameter table.

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

Other

oscillator., The anode is capable of dissipating
20
oscillator., The anode is capable of dissipating 20 kilowatts during
Filament Voltage T
5 V
Filament Voltage T.5 volts
Filament Current
107 A
Filament Current 107 amperes
Filament Starting Current
300 A
Filament Starting Current 300 amperes max.
Filament Cold Resistance
1
Filament Cold Resistance .01 ohms
Filament Heating Time
15
Filament Heating Time 15 seconds min.
Grid-Plate
26
Grid-Plate 26 puf
grid-Filament
25
grid-Filament 25 uuf
Plate-Filament
1
Plate-Filament 1.0 ppf
Water Flow on Anode
8
Water Flow on Anode 8 gpm
Glass Temperature (at hottest part)
180
Glass Temperature (at hottest part) 180° C¢. max.
D-C Plate Voltage
15000 V
D-C Plate Voltage 15,000 max, volts
D-C Grid Voltage
-1800 V
D-C Grid Voltage -1,800 max. volts
D-C Plate Current
3.5 A
D-C Plate Current 3.5 max, amperes
D-C @Grid Current
50 A
D-C @Grid Current .50 max. amperes
Plate Input
45
Plate Input 45 max. kilowatts
Plate Dissipation
20 W
Plate Dissipation 20 wax. kilowatts
D~C Plate Voltage
12500 V
D~C Plate Voltage 12,500 volts
D-C Grid Voltage
-1200 V
D-C Grid Voltage -1,200 volts
Peak R-F Grid Voltage
2100 V
Peak R-F Grid Voltage 2,100 volts
D-C Plate Current
3.5 A
D-C Plate Current 3.5 amperes
D-C Grid Current, approximate
45 A
D-C Grid Current, approximate 45 amperes
Driving Power, approximate
900 W
Driving Power, approximate 900 watts
Power Output, approximate
33 W
Power Output, approximate 33 kilowatts
Frequency [1]
27.5
Frequency 27.5 %0 50 Megacycles
Frequency [2]
0
Frequency 27.5 %0 50 Megacycles
Frequency [3]
50
Frequency 27.5 %0 50 Megacycles
Voltage and Plate Input [1]
100 V
Voltage and Plate Input 100 8o 50 Per Cent
Voltage and Plate Input [2]
8 V
Voltage and Plate Input 100 8o 50 Per Cent
Voltage and Plate Input [3]
50 V
Voltage and Plate Input 100 8o 50 Per Cent
F
6800 W
F-6800 POWER TRIODE

Data set 02

1962 ITT Industrial and Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

GridPlateCapacitance
26 pF
GridFilamentCapacitance
25 pF
PlateFilamentCapacitance
1 pF
FilamentStartingCurrent
500 A
FilamentColdResistance
0.01 ohm
FilamentHeatingTime
15 s

Other

Maximum DC Grid Voltage
-1800 V
ClassC
Maximum DC Plate Current
3.5 A
ClassC
Maximum DC Grid Current
500 mA
ClassC
Maximum Plate Input
45 kW
ClassC
Typical Power Output
33 kW
ClassC