3kp7 crt

[timmy]

Is it possible that just Alittle voltage is getting passed the bright pot and it's affecting the brightness of this 3kp7 which was made in Japan but don't affect the 3kp1 tube. I thought maybe there was some difference between the 2 tubes, so I'll have to see if the bright pot is working properly. It is very odd that it tests very good and even the life test is very good and the getter is shiny and good so I'm at a loss as to why the pic is dark. I even tried thinking maybe the tube is bad and used the rejuv function and made no difference in emission or life test. The emissions didn't come up any more even by raising the heater voltage to as much as 10 volts.