Quote:
Originally Posted by NewVista
I just replaced 1.5k resistor on my 25LC20 (before reading this) old one looked all right but measured low (1.26k). Low resistance is also a sign of heat stress/damage. Maybe it's there to protect rectifier and or Pic tube or people from 22kv!
The HV rect filament wire was hardened from heat and had 1/2" bare stripped connections to socket! Who did that? Not factory?
There was a lot of wax melted from flyback!
The 2,2k final Horiz Output screen resistor looked cooked - was very high 11k! but set worked.
Will soon see if this corrects my vertical lines (is this "diodehausen"? screen picture) |
I am guessing that diodehausen must be an effect similar to barkhausen resulting in vertical lines. You might want to try the Goodman suggestions posted above. They mention a newer version of the 3AT2 solving the problem.
Have you checked the HO cathode current? You mention 22KV, shouldn't that be 25KV? A lower HV setting on my 29JC20 causes the cathode current to rise.
Dave