The Hearth-brazing method (and varients) explanations were enlightening to me and benefitted my vocabulary -- Thanks, but I was at first wondering if it was related to Schwinn's "butt-brazing" (isn't that what they called it?). Obviously not related! Anyway, does anyone know what that long-standing method entailed? I've always wondered, and believe it wasn't brazing at all but was really welding.
David Snyder