http://kd1jv.qrpradio.com/resonatespkr/CWSPKR.HTM Jim Larsen, AL7FS Anchorage Alaska 907-345-3190 http://www.AL7FS.us/ On 9/14/2010 2:25 PM, Sandy wrote: > Anybody got any data on calculating dimensions of tuned speaker tubes? > I 'hade" some data somewhere, but lost it.....dammit.