This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Re: Bridge design ----- Original Message -----=20 From: Ron Overs=20 To: pianotech@ptg.org=20 Sent: July 06, 2002 6:31 PM Subject: Re: Bridge design Del wrote; -- even better, design in a transition bridge -- and/or redesign = the ribbing, and leave out the gaps. Agreed. Of course, the transition bridge is a really sensible work = around for a piano which has bass/treble break which is lower than = desirable, for the particular length of piano. Interestingly, something I have noticed about transition bridges is = that they also need an extension running out from their treble end, to = increase the impedance. This extension would therefore run further out = towards the center of the board.=20 A transition bridge will exhibit the same end-of-bridge impedance = problems as a continuous long bridge. The cleanest solution is to attach = the upper end of the transition bridge to the long bridge and extend the = lower end just as would be done with a continuous bridge.=20 I am thinking now that it should be long enough to run over another = sound board rib. Of course, none of this stuff would be necessary if the = cross was in the appropriate place to start with. After a hundred years = we are still stuck with a multitude of small and mid sized grands with = the cross scaled too far down, just to make them look like their bigger = brethren. I'm not sure what the rational was behind placing the bass/tenor = transition where it is on the so-called 'modern' piano. Especially, but = not limited to, the 'modern' small piano. But it's there and has to be = coped with. The transition bridge is probably the best way to do this, = but even simple rescaling using bi-chords on up a bit is better than = nothing. A lot better! The biggest problem with it is the inability to = blend inharmonicity, but this is more of a tuning problem than a voice = problem. In either case, the end of that bridge -- regardless of type -- best = have an extension of some kind. Del ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/0b/e6/c2/16/attachment.htm ---------------------- multipart/alternative attachment--
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