>At 10:25 PM 04/23/2001 -0700, you wrote: >>About the soundboard spring idea . . .<snip> >>Good luck to those adventurous enough to go where few have gone before. >>Regards, >>Del > >This got me thinking again...about an idea I had a few years ago. >Instead of a spring installed at the KO (Killer Octave) how about an >auxiliary rib. >Jon Page Del, Jon, List, Thought this might be apropos: Re: Sun Mar 17 00:03:37 1996 To: pianotech@byu.edu From: kam544@ionet.net (Keith McGavern) Subject: Re: 88 note pianos -Reply Back in June 1992 Nick Gravagne, RPT and I came up with a technical name for a device I created to eliminate a dead note sound at the tenor/treble break in a Wurlitzer Vertical Grand. That device exerted pressure on one of the ribs via a backpost, thereby enhancing that dead sounding note to blend in with the rest. We christened the device with the honorable title "Anti-Node Dynamic Soundboard Adjuster" (ANDSA). And Barney Ricca, Associate Member did a technical in Dallas showing how by experimenting with adding weights to ribs at various locations can influence nodes and sustain. Barney also mentioned that Del Fandrich has done some clever work to eliminate dead spots as well. Cheers :-) Keith McGavern Registered Piano Technician Oklahoma Chapter 731 Piano Technicians Guild USA
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