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The hiss is very, very light which is why I don't refer to it as an actual corona arc, but I guess any hiss is some sort of arc really. Sometimes it clears up on its own. I tweaked the HV adjustment once or twice and it would go away. This was not at an extremely high or a low setting. Just sort of a sweet spot, but it always comes back. You would think that an arc would be significantly worse with a higher voltage.
I shouldn't be messing with that anyway as I don't have a HV probe/meter, but I know approximately where it was set before. I need to find a probe to set that properly. I agree that I need to find the source as the set will never be up to par with that and it's distortion on the screen.
Again though, nice bright raster until a signal is introduced and then it is blurry and sometimes fades to nearly black as if there were HV trouble, but then you can go to an unused channel and everything is normal.
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