Hello Jim I think it was Klaus Fenner who years ago proved that Kimball's laminated board worked just as good as a solid spruce board using a speaker on an unstrung soundboard with sand patterns. That is if my memory isn't gone too. James Grebe R.P.T. of the P.T.G. Since 1962 in St. Louis, MO Home of Handsome Hardwood Caster Cups pianoman@inlink.com ---------- > From: JIMRPT@aol.com > To: pianobuilders@olynet.com; owner-pianotech@ptg.org; pianotech@ptg.org > Subject: Re: Re: Inharmonicity - so what? > Date: Thursday, August 20, 1998 1:54 PM > > > In a message dated 8/20/98 2:33:40 PM, pianobuilders@olynet.com wrote: > > <<The shaker is excited by a variable frequency sine > wave generator along with a power amplifier.>> > > Del; > Didn't someone, or several someones, do some experimentation using a priciple > something similar?? It seems to me that the thrust of this experimentation > was to place iron shavings on the soundboard , excite the board with some such > device and see the vibratory patterns, etc., that developed, or am I just > having hot flashes? > Jim Bryant (FL)
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