This is a new soundboard project so Im able to place the bridge a bit better. In reality, since its the original bridge I will likely have to make some modifications to this when I actually lay it outIm not making a new bridge body. Most of those modifications are in the tenor section, notes 54 32, in this case. The bridge doesnt have a perfect logarithmic shape, though moving notes 27 31 onto the transition bridge helps. The best way to get all the lines to smooth out is to have a logarithmic pattern through the plain wire section but thats not always possible with the original bridge and/or plate so you settle for a semi-logarithmic pattern, as Del has referred to it, where each section has its own log base. You can do that in the bass section and the transition section as well which will have the bass bridge curving the other way. There are different ways to play with that and as I mentioned previously most of the models which I either use or deviate from come from Del and Ron. Anyway, I can get the capo section onto the bridge body fine with a log scale but lower down I may have to compromise. Not a lot or enough to really effect the spread sheet badly, but in end the curve wont look quite so nice and the string gauge switches wont fall into such a nice 4646 pattern. There are also ways to widen the bridge cap some in the areas where otherwise you get too close to the edge but Im not doing that on this one. Ive been playing with and looking at scales now for a few years but I admit the learning curve is steep and translating what you see on a spreadsheet to what you hear in practice is yet a steeper (and more expensive) curve to navigate. Hell of a lot of fun though and it sure helps explain a lot of what you hear day to day when you actually lay it out and look at it. There are, of course, some serious other factors to considersoundboard response in particular. David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of William Truitt Sent: Thursday, May 28, 2009 3:08 PM To: pianotech at ptg.org Subject: Re: [pianotech] Modified L Scale with 5 note transition Very nice, David. What kinds of things did you do in the plain wire in the treble past the transistor bridge to smooth out the tension, Z, and inharmonicity? Did you play with the speaking lengths as part of your strategy? Will Truitt From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of David Love Sent: Thursday, May 28, 2009 10:25 AM To: pianotech at ptg.org Subject: Re: [pianotech] Modified L Scale with 5 note transition And this is yet another version that Im playing with that is more in keeping with the original Steinway bass section balance yet smoothing the transition between tenor and bass and upping the tension at the top of the treble bridge to try and gain a bit more strength at the top. I know you dont have the absolute numbers but you get the idea. You can have fun with this stuff forever but at some point you have to put it on the piano and see what happens. David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of David Love Sent: Thursday, May 28, 2009 7:11 AM To: pianotech at ptg.org Subject: Re: [pianotech] Modified L Scale with 5 note transition Ive put them both here so you can see a side by side comparison. Original Scale Modified Scale David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Greg Newell Sent: Thursday, May 28, 2009 5:23 AM To: pianotech at ptg.org Subject: Re: [pianotech] Modified L Scale with 5 note transition David, That looks like it will be a pretty good modification. Any chance that we could see the before scale for comparison? Greg Newell Greg's Piano Forté www.gregspianoforte.com 216-226-3791 (office) 216-470-8634 (mobile) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090528/37ce54ea/attachment-0001.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/png Size: 58805 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090528/37ce54ea/attachment-0003.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/png Size: 60822 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090528/37ce54ea/attachment-0004.png> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/png Size: 58703 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090528/37ce54ea/attachment-0005.png>
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