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. 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! Go to <https://www.facebook.com/pages/PianoRebuilderscom/137780082943148> PianoRebuilders.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20120224/dcdc6cdb/attachment-0001.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 31675 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20120224/dcdc6cdb/attachment-0001.jpeg>
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