EntityQ786212· pop 18· linked from 97 articlesvalve amplifierSign in to savetype of electronic amplifierConnectionsvacuum tubeEntityhigh fidelityEntityhot cathodeEntityWorld War IIConceptSoviet UnionConcepttelevisionEntityCold WarEntityelectricityEntityradioEntityInternational Standard Book NumberEntityartificial satelliteEntitytransistorEntitydiodeEntityGlobal Positioning SystemEntityWayback MachineEntitymicrophoneEntityradarEntityelectric motorEntitymicrowave ovenEntitymicrowaveEntityCategoriesValve amplifiers