The ARRL has published Paul Danzer's (N1II) book on Oscilloscopes for Amateur Radio. Paul - a long-time SARA member - gave us the very interesting oscilloscope webinar in March. The book is available at http://www.arrl.org/shop/Oscilloscopes-for-Radio-Amateurs/ $19.98 for ARRL members. 73 Jon, WB2RYV