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Well Stuart, decided your method would be the best one to try first because I already have everything I needed to do it!
Have a heavy duty piece of 1 inch angle iron, two small c-clamps and a short piece of brazing rod. Figured out how to get it all put together, and gingerly tightened the clamp. Cooked the whole mess at ~400 degrees for an hour, then set it on my table saw top to cool.
When I removed the blade from the clamps, you were correct, about half the warp was gone. So, I put it all back together and did it again.
Glory be! when I took the blade out the second time it is perfectly straight!!!!!
It did develop a slight warp in the tang, may be because the angle iron was only about half an inch longer than the blade. But when I put all of the pieces for the handle on the tang I couldn't see the warp at all, AND all of the pre-drilled holes lined up!
Ran a file across the edge and it didn't bite in at all.
I am now doing the temper on this blade. Hopefully it will still be straight when that's done!
I will also do some rigorous testing when it's done.
Thanks a very much!
AL
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