Lenk, John D. creator text S.l.] McGraw-Hill Professional 1991 1st ed. monographic 350 p. ; With step-by-step and circuit-by-circuit directions for audio technicians, field-service engineers, and serious audiophiles, this reference provides sufficient information for the user to design and build audio circuits from scratch. No previous design experience is required to apply the design data. 0070375038 (hardcover) 9780070375031 (hardcover) http://www.amazon.com/exec/obidos/ASIN/0070375038/chopaconline-20 http://www.amazon.com/exec/obidos/ASIN/0070375038/chopaconline-20