Hi there. You're new here so I only assume that you're new to this hobby. Tube swaps have become very popularized by media as super easy and fun, but be aware this is not a beginner's area of the hobby. Be sure to do a lot of reading here and there are a lot of videos on youtube that will teach you how to go about it safely.
Now to answer your question. In my experience, most 25" TVs from around the 90s to early 2000s will swap with a K7000(a) without a yoke swap. Again, you need to research, but if you measure the yoke windings, the resistance value will give a good indication that it will work. Failing that you can swap the yoke with a proper k7000 one, but that is another level of difficulty. I have done a lot of consumer TV to K7000 swaps and have only ever found 1 tube that was not suitable.
Also, just because a TV will work, doesn't mean the TV tube itself doesn't have issues. Generally most TVs don't have nearly the same hours on it as an arcade monitor, but i've picked up a TV or 2 that had really weak tubes. There are some folks that run their TVs all day!
as
@mk3u2012 said, the K7000 and K7000a are functionally identical, a lot of folks don't like the A-variant as the flyback is not currently reproduced, so if it fails, then it's done.