How Cathode Ray Tube Work And Explanation

     It is important to know how a cathode ray tube work and its explanation. Whether you are in the monitor or tv repair, i'm sure you had came across picture tube that has gone dim and no display. Every electron gun has it life span, i still could remembered there was a picture tube that had a very dim display and the monitor was about 1 and a half to 2 years old only. Some picture tubes were designed to last more than 15 years! If you truly understand how electron gun work, you can perform some modification to brighten up the crt. Some technicians suggest to increase the heater voltage to burnt off the contamination while others just used their own home made crt rejuvenator.