[TPIN] Bell Bow (NOT Bilbo Baggins!) Bends

[Glenn Bengry]

Jim,
 
   In repairing these bad bends(without giving away all your secrets), do you run dent balls through and then anneal the bell?  Do you take the bell off?  If so, do you measure the bore size at the tail and make adjustments for improperly drawn tails too? That would be another process altogether wouldn't it?  how difficult is it to draw an undersized tail out to size  or over sized tail down to size?
 
glenn
 
x
x
> Correction of elliptical bell bow cross section is something we've been > offering for years. It is part of a "blue printing" process that can > include measuring and correcting MPC receiver gap, precision valve alignment > and inspecting for concentricity of tubing and removal of solder blobs. I > doubt very much that Vincent Bach ever intended these irregularities to be > included in his original designs. FWIW when a bell bow that is pinched is > corrected, the sound of the trumpet really open up. To quote local Boston > freelance trumpet player Dana Russian " That's the best $50.00 I've ever > spent [repairing] on my trumpet!"> > My 2 cents.> > Jim Becker> Brass Repair Specialist> Osmun Music Inc.> www.osmun.com