VACUUM TUBES Gunnar Ostman Web project for Physics 212 Spring 2015 E34L power pentode tubes used in audio electronics. Photo credit: news.sciencemag.org 3-500Z RF amplifier tubes. These tubes dissipate 500W each and have about 3600V at the anode. Photo Credit: ne7x.com Tube in a 1000W transmitter. Photo Credit: http://flickr.com/photo/8441189@N04/585836949 Index Intro What is a Vacuum Tube? Some History How they work Types and Applications  Bibliography