CRT Televisions

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I remember the tv repairman coming to our house on a pretty regular basis. The only thing he carried was a big box of various sized tubes. He would open the back of the tv, find the bad tube, replace it and then come back several months later to do it again. Can anyone tell me what it is that a tube does?
 
LOL. We use to sell a lot of vacuum tubes. Transistors and circuit boards pretty much replaced the old tubes. These days a tv is more like a computer.
 
me,



The vacuum tube has been replaced by the transistor. Using a transistor one can easily develop and amplifier circuit. Before transistors, vacuum tubes were used as amplifiers.



 


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