This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Clyde it is sometime not a dip problem, even if it looks like (hammer don't drop). been caught there yet too Best Isaac OLEG Entretien et réparation de pianos. PianoTech 17 rue de Choisy 94400 VITRY sur SEINE FRANCE tel : 033 01 47 18 06 98 fax : 033 01 47 18 06 90 cell: 06 60 42 58 77 -----Message d'origine----- De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la part de Clyde Hollinger Envoyé : vendredi 7 mars 2003 13:28 À : Pianotech Objet : Re: Yamaha U1 regulation problem Tom, OK, I certainly hope someone gives you a good answer, because I NEED IT, TOO! I get so frustrated when I find this in pianos that I have been recommending. For those with modest piano replacement budgets I've been recommending the P22. My daughter just bought one. Last week I serviced a 1978 Yamaha P202 with a number of torn flange cords, which is part of the problem, and another part of the problem is insufficient dip in the center. So I need to replace the flange cords and do a good job of key leveling. On a few keys where I already put in a new flange, I was able to stop the bobble by removing front rail punchings to increase the key dip. I thought that was probably the answer, but I hate doing things sort of slipshod like this. I would rather have more-than-average keydip on the whole piano than here and there. But the question in my mind is, if I *did* increase key dip, either at the front or balance rails, would that solve the problem? I once thought I could just shim up the whole balance rail a little. In that Yamaha P22 the thing was *glued down*!! Is it the springs, as Ken Jankura thinks? Should I stop recommending Yamaha verticals? :-( HELP! Regards, Clyde Tom Driscoll wrote: List I recently serviced a U1 vertical for a first time client. Excellent piano very little wear and -tuned up quite well. I did however find lettoff to be over !/4 “and inconsistent. I adjusted to 1/8” –and took up lost motion. Tightened action screws. The key dip and after touch were sufficient, and the jacks are free to travel away from the butts---no interference from that adjustable rail—(sorry, I forget Y’s nomenclature on that component) My client has a light touch and the action still stutters I returned, shortened blow distance readjusted lost motion, and adjusted spoons to re-correct damper timing. My client called again with the same problem and called other technicians for advice also I know bobbling hammers can be a problem on Yamaha verticals and I’ve worked on hundreds of these, but I can’t shorten blow any more and as I mentioned, keydip-aftertouch are correct. I’m hesitant to increase lettoff back to its original excessive amount, so esteemed colleagues ---Any suggestions? I’m going back next week. P.S. Backchecks are also adjusted---I.E. catchers are not bouncing out or off of the backchecks Tom Driscoll RPT ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/c0/2a/9a/10/attachment.htm ---------------------- multipart/alternative attachment--
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