Quote Originally Posted by XYXZYZ View Post
I had a WG K7000 with a similar problem, turns out the flyback unit was shot. (the focus control didn't work) and I learned that K7000 flybacks were notorious for failure, even an aftermarket replacement is better than the original part. After changing it the image was nice and sharp. Given it's failure rate, it wouldn't hurt to replace the flyback when you do the cap kit. As long as you're soldering stuff on the chassis, you know.

Here's one for $36.00 shipped
Thanks for the link. I did play around with the focus, and it did appear to be working. Not sure whether its the kind of thing that just works or doesn't, or if it slowly degrades over time.

I'll try one thing at a time, and give the cap kit a go first.

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Next question: I noticed that the color dials on the back of the tube have two settings for each color. A gain, and a cutoff. What is the difference between the two?

I seem to notice more effect on the picture when I adjust the gain.