<!doctype html public "-//W3C//DTD W3 HTML//EN"> <html><head><style type="text/css"></style><title>Re: Baldwin termination bars</title></head><body> <div>Dave and Fred,</div> <div><br></div> <div>I owned an earlier SD-10 (1975) which we rebuilt in 1988<font color="#0000FF"> (we have just sold the piano to a local enthusiast, and will be re-doing the piano again later this year when it will get one of our actions and a new key board)</font>. It has the one piece per section forged inserts as Fred described. The string noise problem with these pianos is two fold, the large radius of the bearing bars and the uniformly quite long length of the front segments.</div> <div><br></div> <div>The large radius is the most significant problem. We took to the inserts on our piano and reshaped them with an angle grinder, reducing the bars to a smaller radius. This involves cutting a considerable v into the 'joiner bars' adjacent to and between the capo and front duplex bars, but it works just fine. This will improve the tone very significantly. For those notes which remain noisy, the problem will be that the front duplex length is very close to that of a partial of the speaking length. You can detune any offenders by placing a drop of glue onto the front duplex length segment. This will increase the mass of the offending duplex to push its frequency down to detune it, reducing its propensity to vibrate sympathetically with the speaking length.</div> <div><br></div> <div>I use the glue-on-the-duplex trick quite regularly during the course of tuning on the road.</div> <div><br></div> <div>The later SF-10 Baldwins used individual inserts with varying lengths. This enabled an insert to be selected, for each note, with a string segment length which was detuned to the speaking length harmonics. It is a very nice idea.</div> <div><br></div> <div>Best regards,</div> <div>Ron Overs</div> <div><br></div> <x-sigsep><pre>-- </pre></x-sigsep> <div><font size="-2" color="#000000"><br> </font><font face="Times New Roman" size="+1" color="#0000FF"><b>OVERS PIANOS - SYDNEY</b></font></div> <div><font color="#000000"><i>    </i></font><font color="#0000FF"><i> Grand Piano Manufacturers</i></font><font color="#000000"><br>      _______________________</font></div> <div><font size="-2" color="#000000"><br></font></div> <div><font color="#000000">Web http://overspianos.com.au</font></div> <div><font color="#000000">mailto:ron@overspianos.com.au</font></div> <div><font color="#000000">     _______________________</font></div> </body> </html>