High Power Transmitting Vacuum Tube Paper Cups

A 5,000 Watt air cooled ceramic high power transmitting vacuum tube used in radio broadcast transmitters and other radio frequency applications. Vacuum tubes were essential to high power radio transmission until semiconductors developed the capacity to handle the high voltages and currents at radio frequencies. Perfect gift for radio and TV engineers, electronics technicians, hobbyists and ham radio operators. Personalize by adding a name or call letters, if you wish.