| gptkbp:instanceOf | gptkb:vacuum_tube gptkb:microwave_amplifier
 
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                                | gptkbp:alternativeTo | gptkb:klystron solid-state power amplifier
 
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                                | gptkbp:amplifies | radio frequency signals 
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                                | gptkbp:category | electronic components microwave technology
 radio frequency engineering
 
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                                | gptkbp:component | gptkb:spacecraft_communication_system microwave relay system
 satellite transponder
 
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                                | gptkbp:failureMode | cathode degradation collector overheating
 vacuum loss
 
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                                | gptkbp:feature | gptkb:vacuum_electron_device wide bandwidth
 high gain
 linear amplification
 
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                                | gptkbp:frequency | 300 MHz to 50 GHz 
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                                | gptkbp:inventedBy | gptkb:Rudolf_Kompfner 1942
 
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                                | gptkbp:operates | interaction of electron beam with RF field 
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                                | gptkbp:powerOutput | up to several kilowatts 
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                                | gptkbp:relatedTo | gptkb:Tesla_coil gptkb:backward_wave_tube
 gptkb:gyrotron
 
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                                | gptkbp:requires | high voltage power supply 
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                                | gptkbp:type | gptkb:coupled-cavity_TWT gptkb:helix_TWT
 
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                                | gptkbp:usedIn | gptkb:electronic_warfare gptkb:radar
 gptkb:television
 satellite communication
 
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                                | gptkbp:bfsParent | gptkb:Microwave_Devices 
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                                | gptkbp:bfsLayer | 6 
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                                | https://www.w3.org/2000/01/rdf-schema#label | Traveling Wave Tube 
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