<font color='navy' size='2' face='Comic Sans MS, sans-serif'><pre style="color: rgb(0, 0, 0); font-size: 9pt;"><tt><font face="Comic Sans MS, sans-serif">Yep, I agree too. It just hasn't been necessary in my experience, to
weaken damper springs to fix double striking hammers and the dealer
wasn't interested in paying for such things anyway. ROn N</font></tt></pre><pre style="color: rgb(0, 0, 0); font-size: 9pt;"><tt><font face="Comic Sans MS, sans-serif"><br>
</font></tt></pre><pre><tt><font face="Comic Sans MS, sans-serif"><span style="font-size: 9pt;"> </span><span style="font-size: 12px;">Initially</span><span style="font-size: 9pt;"> I did this on a mass installation of Yams. P2s and Kawais ust-7s and some prambergers at a college near Napa,Ca. The touch on all of them was ridiculously heavy. </span><span style="font-size: 12px;">Changing</span><span style="font-size: 9pt;"> the damper spring tension </span></font></tt></pre><pre><tt><font face="Comic Sans MS, sans-serif"><span style="font-size: 9pt;"> transformed the touch in a beautiful way. Made em very fluid</span></font></tt></pre><pre><tt><font face="Comic Sans MS, sans-serif"><span style="font-size: 9pt;">Dale E.</span></font></tt></pre><br>
<div style="color: navy; font-size: 10pt; font-family: 'Comic Sans MS', sans-serif; clear: both;"><font size="1" color="royalblue"><b><font face="Georgia, Times New Roman, Times, Serif"><font color="black"><font color="mediumblue" face="Comic Sans MS, sans-serif">Dale Erwin R.P.T.<br>
<font color="green">Erwin's Piano Restoration Inc.</font><br>
</font></font></font></b></font><font color="darkgreen"><span style="font-style: italic;"><b><font size="1"><font size="1" color="black"><font color="blueviolet"><font color="black"> <font color="black" face="Comic Sans MS, sans-serif">Mason & Hamlin</font><font face="Comic Sans MS, sans-serif">/Steinway/</font><font color="black" face="Comic Sans MS, sans-serif">U.S. pianos</font><font face="Comic Sans MS, sans-serif"><br>
</font></font></font></font><font size="1" color="cornflowerblue" face="Comic Sans MS, sans-serif">www.Erwinspiano.com</font><font size="1"><br>
</font><font size="1" color="crimson" face="Comic Sans MS, sans-serif">Phone: 209-577-8397</font><br>
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<div id="AOLMsgPart_0_05aceae5-3bed-49b3-9f62-f89b24b6a7fd" style="margin: 0px;font-family: Tahoma, Verdana, Arial, Sans-Serif;font-size: 12px;color: #000;background-color: #fff;"><pre style="font-size: 9pt;"><tt>*Subject:* Re: [pianotech] Yamaha Uprights
>
> My observation is that a damper spring, upright or grand, only needs
> enough tension/pressure to insure shut-off. Beyond that we aren't
> depending on it to adjust touch weight. The damper resistance should
> be minimal.
>
> *Dale Erwin R.P.T. **/ /*----
Yep, I agree too. It just hasn't been necessary in my experience, to
weaken damper springs to fix double striking hammers and the dealer
wasn't interested in paying for such things anyway. It does occur to me
that there is one change I typically made. New Yamaha verticals always
came with the capstans high and the hammer shanks floating uniformly
above the rest rail. I'd shim the rail up to get minimal lost motion, so
I could pull the shims a few years later and just have to do the capstan
adjustments once. That would have introduced very slightly more lost
motion and might well have made a difference.
Ron N
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