Alan, If you're using the Wurzen you should look carefully at the hammerweight to make sure they aren't too heavy. I'm putting a set of regular 16lb Ronsens (maple moldings) on a Baldwin right now and I'm having to remove about .5 gm from each hammer to get a high medium strikeweight curve. I don't know if the Sapele moldings are significantly lighter or not. I've been using Renner and Tokiwa with about equal results though there is a bit more re-pinning on the Tokiwa after the break-in period. I have a couple of sets of Abel waiting to be installed but have no experience with them yet. Eric Eric Wolfley, RPT Supervising Piano Technician College-Conservatory of Music University of Cincinnati -----Original Message----- From: Alan McCoy [mailto:amccoy@mail.ewu.edu] Sent: Tuesday, June 21, 2005 1:30 PM To: College and University Technicians <caut@ptg.org> Subject: Re: [CAUT] Baldwin specs Thanks Eric. This will be helpful. I'll let you know how it goes. It is 5" at one end and a smidge less on the other. I'll be going with Ronsen Wurzen hammers on this and probably Renner shanks. What has been your recent experience with parts from Renner, Abel, or Tokiwa? Alan > From: "Wolfley, Eric (wolfleel)" <WOLFLEEL@UCMAIL.UC.EDU> > Reply-To: "College and University Technicians <caut@ptg.org>" <caut@ptg.org> > Date: Tue, 21 Jun 2005 11:45:15 -0400 > To: 'College and University Technicians' <caut@ptg.org> > Subject: RE: [CAUT] Baldwin specs > > Alan, > Check both extreme hammers...sometimes it's 4 7/8" at one end and 5" at the > other. By changing to 5 1/8" you are then able to move the stack 1/8" > towards the keyboard and retain the correct strikepoint. You'll need new > S&F's to do this. You need to chisel 1/8" off of the bass and treble > shoes...do it precisely and it will be good for accurate positioning when > drilling new holes for the action brackets. Plug all the old holes with > side-grained maple plugs. After you reposition the stack you can look at the > capstan placement. Most of these Baldwins have around a .58 key ratio. By > moving the capstan line you can improve this to about .52 without having to > change the wipp heels and compliance with the magic line is good. By doing > all this you usually end up with an action ratio of 5.5 or so, keydip .400", > blow 1 3/4", and you can usually reduce the frontweights by a significant > amount. I've done these adaptations as a part of a Stanwood Precision Touch > Design to a number of pianos in the practice rooms here and so far it's been > a win-win situation. The students really like these actions. > > Eric > > Eric Wolfley, RPT > Supervising Piano Technician > College-Conservatory of Music > University of Cincinnati > > > -----Original Message----- > From: Alan McCoy [mailto:amccoy@mail.ewu.edu] > Sent: Monday, June 20, 2005 5:00 PM > To: College and University Technicians <caut@ptg.org> > Subject: Re: [CAUT] Baldwin specs > > Hey Eric, > > OK. The jack angle is actually begging for the spread to be moved out a bit, > which would be more toward spec. The hammer line is 5" as you suspected (and > knuckles are at 17mm). So what kind of magic are you working on these > actions with the too-short hammerline? This one needs hammers this summer > anyway, so assuming I can bribe well enough for some parts money, it'll get > done. > > Alan > > >> From: "Wolfley, Eric (wolfleel)" <WOLFLEEL@UCMAIL.UC.EDU> >> Reply-To: "College and University Technicians <caut@ptg.org>" > <caut@ptg.org> >> Date: Wed, 08 Jun 2005 16:37:42 -0400 >> To: 'College and University Technicians' <caut@ptg.org> >> Subject: RE: [CAUT] Baldwin specs >> >> Alan, >> >> The factory spec for spread is 4 27/64". You can move this around a little >> but need to keep an eye on the jack angle under the knuckle. Check the > shank >> length from the flange center to the center of the hammer molding. It > should >> be 5 1/8". We have a lot of those pianos here and I have found most of > them >> to have 5" or even 4 7/8" shank lengths. If this is the case, let me know >> and I'll tell you what I've been doing to drastically improve these > actions. >> >> Eric Wolfley, RPT >> Supervising Piano Technician >> College-Conservatory of Music >> University of Cincinnati >> >> >> -----Original Message----- >> From: Alan McCoy [mailto:amccoy@mail.ewu.edu] >> Sent: Wednesday, June 08, 2005 4:04 PM >> To: CAUTlist >> Subject: [CAUT] Baldwin specs >> >> Hi Folks, >> >> I'm working on a 1970 Baldwin L. Anyone know what action spread these > babies >> work well with? This one has a consistent 4.40" spread. Capstans are >> centered under the wip cushions, but with the keys at rest the contact > point >> is on or very slightly above the line of convergence. Key ratio is >> 0.55-0.56. >> >> Thanks. >> >> Alan >> >> >> -- Alan McCoy, RPT >> Eastern Washington University >> amccoy@mail.ewu.edu >> 509-359-4627 >> >> >> >> _______________________________________________ >> caut list info: https://www.moypiano.com/resources/#archives >> _______________________________________________ >> caut list info: https://www.moypiano.com/resources/#archives > > > _______________________________________________ > caut list info: https://www.moypiano.com/resources/#archives > _______________________________________________ > caut list info: https://www.moypiano.com/resources/#archives _______________________________________________ caut list info: https://www.moypiano.com/resources/#archives
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