Colleagues , I come back with this post that you may not have noticed. It is a prcocess to produce some sort of annealing on new strings - make sense, comments welcome ( no flame suit at this moment it is being cleaned) if you want the strings to sound more brillant, may be they may be aged (other strings as well) The method, developped by Klaus Fenner is : On the first four plain wires, raise the pitch one major third -adding 59% tension approx- 17 notes higher minor third (4 notes) 17 notes higher one tone 17 notes higher half tone The 4 notes group begin every 20 notes The next day (20 hours later) put at their normal pitch the raised notes, and reapeat the process on the next four ones. when approaching the next section the added tention may be lower, in the high treble if the strings are very long (C8 = 53 mm for instance) one may be lowering the added tension - as the strings are yet sollicited more than usual because of their lenght. It takes 5 days to go thru all the process, the strings are then spaced, eyelets closed, and the piano is fine tuned. The temperature of the room plays a role too, the plastic deformation (fluage in French), is ten times faster if the temperature is 13 c? higher - 22? to 35 c?. A string that is tensionned at 40% of its beaking strain is loosing 1.13% of its tension in 5 years - if tensionned at 60% it loose 7.4% in 5 years One year under normal condition ar giving 7% tension loosness. New strings have an elastic response, and they will tone less because of that. The above treatment give strings that are supposed to resist better to tension, because their plasticity limit is nearer. How the wounded strings are treated I don't know at this date, I've heard of a 1 tone added tension, I'll ask for more details... The result is the same as aging the strings, the added tension leave them slightly above their plasticity limit for a short time, and they are then more resisting to stress (higher breaking point) they are then stable and tone better. The strenght of the plate pins, and bridge pins may well better be double checked before doing so. Schimmel is using this process I've been said, indeed their pianos have always very brillant strings I noticed yet. The basic idea is that it takes 5 years to the strings to stabilise totally comments welcome. Best Regards Isaac OLEG Entretien et reparation 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 Isaac OLEG > Envoye : dimanche 6 juillet 2003 01:09 > A : billpillmore@earthlink.net; Pianotech > Objet : RE: Voicing restrun Steinway S > > > First wait the string to settle a bit ( a few days, up to a week) , > and check the strike point for all the hammers, is it optimal, > possibly you have to reglue some portion of the treble, and > anyway to > position the action. > Before deciding the tone is definitively too thin, hammers > have to be > played for some time, and definitively shaped. > > On dope, for European style hammers, uit is only for the last treble > hammers if we want tokeep that lively quality that gives the > unlaquered hammer if working well. For the US heads, I don't have > experience with it. > > Best regards. > > > Isaac OLEG > > Entretien et reparation 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 Bill Pillmore > > Envoye : samedi 5 juillet 2003 21:53 > > A : pianotech@ptg.org > > Objet : Voicing restrun Steinway S > > > > > > Just finished restringing a Steinway S with factory wire, > > scale, and > > preglued hammers. The top octave and a half is very anemic. does > > anyone know what the factory does to prep these hammers > > (talking about > > doping here) or any suggestions. > > Thank you > > Bill Pillmore > > > > _______________________________________________ > > pianotech list info: https://www.moypiano.com/resources/#archives > > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives > _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
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