21zp4a crt sub

[bandersen]

Setting the HV higher will likely cause the image to shrink. It's harder to deflect a more energetic electron.

Now the flyback also drives the horizontal yoke winding so it's not quite so simple. Generally, the more energy you dump into the flyback, the more HV and more deflection so they track.

Really it depends on the design and component matching. There's usually a sweet spot when you get the lowest cathode current, most HV and full width. That's why there are so many adjustments - hor. drive, width and linearity all need to be set properly to get optimal results. That's a bit of a black art.

[timmy]

Originally Posted by bandersen

Setting the HV higher will likely cause the image to shrink. It's harder to deflect a more energetic electron.

Now the flyback also drives the horizontal yoke winding so it's not quite so simple. Generally, the more energy you dump into the flyback, the more HV and more deflection so they track.

Really it depends on the design and component matching. There's usually a sweet spot when you get the lowest cathode current, most HV and full width. That's why there are so many adjustments - hor. drive, width and linearity all need to be set properly to get optimal results. That's a bit of a black art.

Well as of now I guess it’s safe to say I got the best sweet spot the screen is stable focus is acceptable and it looks good. I did set the hv to 10.2kv but the width couldn’t open it up was to much. I went over so many times with the both vertical adjustments afc to stabilize the horizontal hold and adjusted the rings on the neck I don’t think it can get any better since these sets will never be perfect. And when I lowered the hv it pulled in on the left and right but if I raised the hv to 13 kv a white line begins to show in the center of the screen 12 -6 position.