On Sun, 15 Oct 2017 01:36:55 +0000, bob prohaska wrote:

Speaking of setup, holding the parts in position looks rather difficult;
the broken tab is only about 1/8" square. Can anybody suggest some sort
of putty that will resist brazing heat, hold the (very small) parts in
place and not sinter to something indestructible when heated? Maybe
glazier's putty, but that can get rather hard. Fire stop caulking?
modeling clay? Perhaps something made from household chemicals like talc
and water?


Does the tab, when not broken, have enough of a curve that a bit of brass
shim stock could be cut and shaped to lie on the outside of the curve and
hold the parts in place; solder all three together.