David T. Fedderly retired after 31 years as Principal Tuba of the Baltimore Symphony Orchestra. He has taught at many Universities including Peabody Conservatory of the Johns Hopkins University, University of Maryland, The Juilliard School, and DePaul University. He is active as a clinician throughout the United States and in Canada.  He founded Baltimore Brass Co. in 1992, located in Catonsville, Maryland. Sales of new and used instruments and a full repair department distinguish it as a destination for many musicians world-wide.  Mr. Fedderly is co-author of Brass Instruments: Purchasing, Maintaining, Troubleshooting and More (Meredith Music Publications).