Sorry! After reading many threads about pressure canning I just refined the search and I found some more threads to read. I will post any other questions I may have after I read the ones I just found...

Usually any size canner should not be used on a flat glass top stove. The weight is the issue with water and the filled jars jars it can weigh quite a lot and put stress on the glass. There is a very high wattage (1500) electric burner you can use for the canner, and it should work.

The other option is an outdoor propane burner. There is one sold by Northern Tool that has three burner rings with seperate gas controls for each. It must be used outdoors.

Here is a link that might be useful: High quality 1500 W electric burner

Thanks Ken. I'm disappointed, because I just got my nerve up and I made chicken stock today. But I'll freeze this batch and order one of those electric burners. I don't want to crack my glass top.

The only pressure canners that are safe to use on a glass top stove is Presto. Then, it may still depend upon the manufacturer of your stove. It may cycle on and off, not able to keep the canner up to pressure properly.
Then, they can crack due to the heat and weight.
I hope you find a solution to your problem.
Just be sure if you get an electric element it can support all the weight and hot enough to get the water hot enough and keep it that way. Plus, be sure the heat won't destroy any countertop underneath it.
There are some gas stoves that could be used outside, but not the turkey fryers. The canners come with warnings about not being safe to use a turkey fryer burner for canning on.
It is hard when you don't have a good indoor stove to can on.

I can really tell you that the high quality electric burner is quite heavy duty. Its not like the thin light weight kinds you see that are usually only 1000 watts. It should hold up well. Even though its probably smaller than the canner pot. You may need to raise it a bit to gain access to the temperature control, as it could be covered over by a larger diameter pot. Be sure to use a good nearby ac outlet, and no extension cords!

Good advice about the extension cord, Ken. I'm just not sure what you mean about raising it to gain access to the temp control? Do you mean just lifting it, adjusting, and lowering it again?

If the canner pots diameter is more than 12 inches, it will overhang the burner a little. If the canner is bigger than 12 inches in diameter, the hot plate control knob will be underneath the canner and in a narrow space between the hot plate and canner. Hardly wide enough to fit a hand in there without getting burned, should you need to adjust the heat. My canner is 20 inches in diameter so I have to raise the hot plate a couple of inches, and then I can fit my hand under the pot and reach in to adjust the heat control.

Ok, that makes sense.. thanks!

I've actually canned for years and years, but not with a pressure canner. And I haven't had any problem with my glass top stove, but I don't want to push it, now that I know about this.