Thanks for the information Ron. When I worked at Steinway in the Regulating department, we had a nose plane. It was a good size plane with the blade up front with no frame in front. I haven't seen one since. It came in very handy preparing the key bed. Unfortunately it was company property. That would be a great tool for reduce the thickness of the panel perimeter around the edge. Tried a Google search but could find anything like it. Al -------------------------------------------------- From: "Ron Nossaman" <rnossaman at cox.net> Sent: Sunday, January 25, 2009 6:22 PM To: <pianotech at ptg.org> Subject: Re: [pianotech] Diaphragmizing > Al Guecia/AlliedPianoCraft wrote: > >> <snip> Rebuilding with an existing board, thinning the bass (or >> channeling like Overs and Seiler) can be very worthwhile. >> >> Can you explain how you do that? >> >> Al > > Ron O has a photo on the opening page of his website > http://www.overspianos.com.au/ showing the soundboard with a channel > routed around the inner rim in the bass, thinning the panel perimeter. > This is a laminated panel, so tapering it wasn't a reasonable option. The > channel did the trick very nicely. > > Another approach, on a solid panel, is to plane, chisel, grind, gnaw, or > otherwise reduce the thickness of the panel perimeter around the edge of > the bass, tapering it back to full thickness in the middle. If you have > sufficient back scale length in the bass to make it worth the trouble > (since you already have the plate out), it should help bass response > noticeably. If you have the classic 40mm back scale on A-0, don't bother. > > Ron N > >
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