This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment > Hi All, > This week I will be diagnosing a new, very noisy, Nordiska grand > action for a concerned dealer. > Nordiska is Chinese manufactured as you probably know. > Excessive action noise, present thru whole action, but worse on some > keys/sections > Key bushings are very loose, both balance and front rails. > Seems they've used a very thin bushing cloth that doesn't match the > combination of skinny balance rail pin and key mortise. > > The dealer has seen some improvement thru repinning wippen flanges in > previous actions. > On this particular action, seems like flopping keys is the main > culprit. > We're going to regulate, rebush and glue size balance rail holes on a > few keys to hear results. > > Any thoughts? > > I'm also suspicious of: > > Rep lever adj screw felt; creating noise when rep lever cycles and > returns to rest quickly, sort of a click sound > Rep lever buckskin contacting bottom of drop screw; another possible > click > Hammer rest cushion material used is really keybed felt, too > hard/dense IMO; hammers bouncing on this material & rail system > produce an audible "thump tone". > Also found a few loose backchecks. > > > Best regards, > > Brad Smith, RPT > Smith Piano Services > 483 Donald Street > Bedford, NH 03110 > > 800-964-TUNE (8863) > 603-625-4696 > brad@smithpiano.com > www.smithpiano.com > NEW!! 24/7 Online Appointment Scheduling > <http://www.smithpiano.com/schedule.htm> > > ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/0b/26/20/47/attachment.htm ---------------------- multipart/alternative attachment--
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