<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'> I would put the split shots the other way around so with a hard blow they would be less likely to loosen. The abrupt stop would be towards the closed side of the split shot. <div><hr id="stopSpelling">From: deanmay@pianorebuilders.com To: pianotech@ptg.org Date: Fri, 24 Feb 2012 19:10:50 -0500 Subject: [pianotech] adding weights <style> .ExternalClass .ecxshape {;} </style> <style> </style> <style> .ExternalClass p.ecxMsoNormal, .ExternalClass li.ecxMsoNormal, .ExternalClass div.ecxMsoNormal {margin-bottom:.0001pt;font-size:12.0pt;font-family:"Times New Roman";} .ExternalClass a:link, .ExternalClass span.ecxMsoHyperlink {color:blue;text-decoration:underline;} .ExternalClass a:visited, .ExternalClass span.ecxMsoHyperlinkFollowed {color:purple;text-decoration:underline;} .ExternalClass p.ecxMsoPlainText, .ExternalClass li.ecxMsoPlainText, .ExternalClass div.ecxMsoPlainText {margin-bottom:.0001pt;font-size:10.0pt;font-family:"Courier New";} .ExternalClass p.ecxMsoAutoSig, .ExternalClass li.ecxMsoAutoSig, .ExternalClass div.ecxMsoAutoSig {margin-right:0in;margin-left:0in;font-size:12.0pt;font-family:"Times New Roman";} .ExternalClass span.ecxEmailStyle17 {font-family:Arial;color:windowtext;} @page Section1 {size:8.5in 11.0in;} .ExternalClass div.ecxSection1 {page:Section1;} </style> <div class="ecxSection1"> Subject was 30 year old Wurly console. Complaint was intermittent sluggish keys.   This was a multiple problem child. The presenting problem was jacks not resetting. It had the nasty felt for the knuckles and backchecks which contributed to excess friction on the jack. Then downweight was in the low 40 gr range and upweight was less than 20. I find that that kind of low upweight causes problems. It just isn’t enough to get things reset.   I changed out knuckles and backchecks to Ecsaine to improve friction. Then I added about a 10 gram weight into the back of the key and about a 4 gram fishing line weight to the bridle strap wire. I also reduced hammer spring tension slightly and damper spring tension until I was measuring around 25g at damper head. Reducing these spring tensions helped keep downweight from going up too much by adding the key/wippen weights. The results were down weights around 50g and upweights in the mid to upper 20g.   <img width="598" height="449" id="ecx_x0000_i1025" src="cid:image001.jpg@01CCF328.04D856B0">   I added a drop of thick CA after crimping the weight just for a little insurance.   The improvement was huge. A very responsive action. This is the first one that I’ve done adding the keyweights and wippen weights.   Dean Dean W May                        (812) 235-5272 voice and text PianoRebuilders.com           (888) DEAN-MAY         Terre Haute IN 47802           Give us a LIKE on Facebook! <a href="https://www.facebook.com/pages/PianoRebuilderscom/137780082943148" target="_blank">Go to PianoRebuilders.com</a>   </div></div> </div></body> </html>