As a manufacturer that has been producing old-fashioned electronic tubes for decades, theoretically speaking, there should be a qualitative leap in technology and product quality control and better products, especially these products with high maturity in processes and materials. Unfortunately, a pair of 211 power electronic tubes replaced during this period are indeed unsatisfactory. Since the previous customer used the tubes on the original machine for many years, it is already in poor working condition, so a new tube needs to be replaced
This is the picture when taking the new tube back to measure the filament
also praised these tubes for being good when debugging. The screen pressure is 13 00V screen current also used 63mA screen consumption of 82W, which exceeded the 75W of the user manual, but there was no over-screen consumption of the power tube. It is worth commending
Because the new tube needs several days to aging and debug, I turned on the computer intermittently and listened to music these days. Who knew that when I turned on at noon today, I found that one of the tubes had an aperture, and my heart was almost broken. The new tube started to have cracks in a few days. The glass tube almost leaked. The vacuum caused the tube to not work. It seems that this tube is in danger. The electronic tube is very heated. The heat generated in the working state of the electronic tube. It can't last long for the switch to turn off the machine. It's really not easy to love it.
