Originally Posted by
David Tollefson
Use some vise-grips to hang some weight on the piece, then carefully and evenly heat it up until it drops off.
And position the work over a bucket of water, so when the hot piece falls off, it lands in the water.
Use a soft flame and don't let it get to red.
Concentrate the heat on the braze-on, not the tube.
You'll still have some residual silver to sand down, but a lot less than grinding and filing the whole thing.
While the silver is still molten, take a wire brush and simply brush off as much as you can. Often you'll find very little left to file off when it cools.