---------------------- multipart/alternative attachment Hi Isaac, Concert prep is done for each individual pianist, the=20 piano is always put back to a more normal regulation after the gig. But those Yamaha frames, seem to like some tension in them. Steinway's=20 with Kluge key beds. much the same thing. I prefer hardwood frames, and I am well aware of both arguments. Just less= =20 action saturation with the hardwood frames. IMHO. I guess the most important thing to come from this thread, is that for a=20 performance piano, key bedding should be checked and double checked.. Regards roger At 06:03 AM 5/24/2003 +0200, you wrote: >Yes Roger, > >On the other hand, that kind of treatment is in the end abuse to the=20 >instrument, Japanese use to say that it is unfortunate, but concert prep=20 >is in the meantime destroying the instrument. > >Warping up the stack more and more on Steinways finally warp the wood more= =20 >or less definitively I guess. > >On soft wood less problems, but still the action may suffer if overdriven= =20 >mode is considered (shanks on cushion, etc) as its normal regulation. > >I guess you put things more "civil" after hours, if you want to keep your= =20 >instrument longer is not it ? > >Best Regards > >Isaac OLEG > >Entretien et r=E9paration 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=20 >part de Roger Jolly >Envoy=E9 : samedi 24 mai 2003 00:33 >=C0 : Pianotech >Objet : Re: No Power Yamaha revisited > > >You got it TOYOTA! <G> Do it this way even when you don't think there= =20 >is a problem, and note the results. You are going to be surprised. > On some Concert grands for favorite pianist, I will have the cheek=20 > blocks in and tight, and just tension the rail a little, then restore=20 > after touch by lowering the hammer line. Neat trick for a big concerto,=20 > for a not so big piano. Shush! did I say that. > >Have a good week end. >Roger > > >At 12:49 PM 5/23/2003 +0200, you wrote: >>Thanks muchly Roger... >> >>seems to be the description that makes the most sense so far. Very=20 >>roughly then, adjust the glide bolts so that they all are in contact with= =20 >>the bed, AND all lift the balance rail to the point that the Front Rail=20 >>is just a nats butt away from being lifted as well... >> >>Key height and the rest is set afterwards. >> >>Correcto ? >> >> >>Roger Jolly wrote: >>>Hi Avery & Ric, >>> I have a good minds eye view, of what is going >>>on, but I'm not so sure I can explain it well. But here goes. (Send me= a >>>deluxe flame suit Conrad). >>> >>>If you have the bolts just touching, there is no compression force acting >>>on the balance rail. With rapid forceful playing, there is a small= amount >>>of bounce taking place at the balance rail, robbing the action of a lot= of >>>energy. It gets dissipated within the frame. >>>Jack the bolts a little further down, you start to bow the cross >>>struts. and putting some compression into the rail. , and firmly seating >>>it to the bed. At the Yamaha Technical Academy, they spend a good deal= of >>>time teaching you how to tune these rails in aurally. takes more than a >>>little practice to get optimum results. >>>The front rail is done first, by tapping on the front rail with a kind of >>>45 degree blow, to the leading edge of the rail. (You can hear better= than >>>the traditional method of holding a key down and thumping on the key, the >>>front rail punching absorbs a lot of noise,) Then the bolts are adjusted= so >>>the front rail just starts to lift, then back off about 1/4 turn. Next >>>step is get all the glides bedded so the tone is the same when lifting up >>>on the hammer rail, and thumping down on the balance rail. >>> >>>The closest analogy I can think of, is like string bearing across the >>>bridge. Too much bearing and a loss of tone, too little loss of tone. >>> >>>Now I will crawl under my rock and smile. >>> >>>Regards Roger >>> >>> >>Cheers >>RicB >> >>-- >>Richard Brekne >>RPT, N.P.T.F. >>UiB, Bergen, Norway >><mailto:rbrekne@broadpark.no>mailto:rbrekne@broadpark.no >>http://home.broadpark.no/~rbrekne/ricmain.html >><http://www.hf.uib.no/grieg/personer/cv_RB.html>http://www.hf.uib.no/grieg= /personer/cv_RB.html=20 >> >> ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/43/f9/64/e0/attachment.htm ---------------------- multipart/alternative attachment--
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