Lance, I try to get the bass in the high 20's and taper the tension to just heavier than the ones continuing without springs in the treble. The tabs are an improvement because the older rigid tabs would thump when raised while the sostenuto was disengaged. This could be felt in the fingers. The spring-loaded tabs make for a smoother transition. Regards, Jon Page >Thanks Jon...Next time, though. I'm overdue here, the customer is more than >anxious and I am late and over budget on both parts and time put in. I've >got to make this work. I will look into back actions now that I've seen the >presentation, but it has to be on the next action. Thanks again. > >P. S. Can you tell me why the tabs in particular are such an improvement? >I'm wondering what this one was like in 1913. > >-----Original Message----- >From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On Behalf >Of Jon Page >Sent: Thursday, August 19, 1999 1:55 PM >To: pianotech@ptg.org >Subject: Re: Steinway underlever spring tension > > >Lance, >It is well worth the effort to replace the back action as well. >The spring-loaded sostenuto tabs make all the difference in the world. >I would say that it is as important as replacing wippens. > >With the Renner USA Underlever Kit is very easy to make a duplicate rail. > >In the back of the instruction booklet which accompanies the kit is >a list of suggested tensions. > >Regards, > >Jon Page > >At 07:23 AM 08/19/1999 -0500, you wrote: >> >> >>List, >> >>I am rebuilding a Steinway model O, 1913. I've replaced the action with >all >>Renner and I'm using the old back action (damper system) since it is in >very >>good condition. I have prepped it, reinstalled it and I've gotten the >usual >>too heavy touchweight due to the spring tension on the underlevers. >> >>I plan to put the system back on the workbench and use a small digital >scale >>to weigh-off each underlever, setting the spring tension on each >underlever. >>Does anyone have any guidelines/gram #'s on what I should shoot for to get >>good weight and good damping? I attended the Renner all-day class in K.C., >>but neither my notes nor memory recall specific instruction on this. In >the >>past I have weakened them and guesstimated it. Thanks in advance. >> >> >> >>Lance Lafargue, RPT >>Mandeville, LA >>New Orleans Chapter >> >Jon Page, Harwich Port, Cape Cod, Mass. mailto:jpage@capecod.net >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Jon Page, Harwich Port, Cape Cod, Mass. mailto:jpage@capecod.net ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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