---------------------- multipart/mixed attachment >Hi Ron! > >I'm not sure I understand how you want to achieve this and why it's easier >to adjust the impedance by using 3 bridges. With the usual two bridges, the low end of the tenor is pretty close on the soundboard to the low end of the bass. Since the low bass wants a considerably more flexible board than the low tenor, one of these bridges won't get what it wants from the soundboard assembly when they are in close proximity. Adding a transition bridge separates the low tenor from the low bass and gives you more room to tailor the soundboard impedance (with rib placement, panel thickness, grain angle, bass float, mass lading, and/or whatever) to more nearly meet the needs of the scale. With the transition, you can now make soundboard impedance in the low tenor more nearly match that of the high bass (which is what you ideally want) without killing the low bass. Here's a sketch showing both the original tenor bridge, and a transition. >And, would you put 2-string unisons on both tenor and bass bridge, or just >on the tenor bridge? > > Calin Tantareanu Wrapped bichords on both the high bass and the transition, plain wire trichords on the long bridge. ---------------------- multipart/mixed attachment A non-text attachment was scrubbed... Name: transbridge.jpg Type: image/jpeg Size: 51654 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/1d/ec/8d/af/transbridge.jpg ---------------------- multipart/mixed attachment Ron N ---------------------- multipart/mixed attachment--
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