Dumb question: RCA 17 AD X Fine Tuning
 

When I have channel 3 selected, and tune in color and crispness the best the tv can do, the buzz in the sound is very thick in the signal. I can never get this clarity/color (with color tuned turned low/ tint low) without very thick sound distortion.

However if you fine tune channels 2, 3 or 4 to remove buzz you lose color and contrast/sometimes horizontal. You can tune in crisp black and white and turn color up but it seems on the extreme of color dial turned to the right.

This sounds confusing so when I get a chance to record it I will and post the video.

If you replaced the color video.outputs that may have perked up the brightness. If you ever have the heaters on one or both of those tubes go dark from a bad board ground you'll see the screen go dark.