I thought I'd ask if anyone's seen this issue before I tore into it. I've got a 7401 that starts out looking fine. The longer it's on....the brighter the screen becomes....all white background and washed out....basically, like the screen pot is up too high. I can adjust it out with the screen pot/focus, but if left on....it's too bright within a couple hours. And if I turn it off for the day (after adjustment), it's too dim when turned back on. From start-up, it takes a couple hours before it starts to "brighten".....and takes 10-12 hours before it's full on bright.
I did a cap kit, swapped flyback from a good chassis, swapped neckboards from a good chassis, tube looks good on the rejuvenator...I even tried the chassis on another tube. Any ideas?
Thanks!
Edward
I did a cap kit, swapped flyback from a good chassis, swapped neckboards from a good chassis, tube looks good on the rejuvenator...I even tried the chassis on another tube. Any ideas?
Thanks!
Edward
