The only way to find out is to bring it up and see what goes wrong. Of course, while you will be doing the pitch raise(s), you might want to monitor the piano's reaction. Does it start to sing more, or is it getting weaker as you raise tension. Also have a look at the damper timing since one early sign of pinblock failure is that the dampers will be very late.Marcel Carey, RPTSherbrooke, QC> Date: Thu, 8 Jan 2009 17:29:26 -0600> From: dahechler at charter.net> To: pianotech at ptg.org> Subject: Re: [pianotech] Collard & Collard revisited> > This collapsing that everyone keeps talking about - does that apply to> antique uprights - like this one is ?> > David Doremus wrote:> > Dean May wrote:> >>> >>> >> The best reason to not do it is the customer will perceive you as having> >> destroyed their precious piano if it does collapse. Better to tune it> >> to 150> >> cents flat.> >> > Hi Dean, of course you are right. I was assuming that all relevant> > warnings of customers had taken place, and I also was speaking a wee> > bit tongue in cheek. I have several old instruments that live very> > happily a half a step flat. But if the owner wants it at 440, the> > English pianos were built for it, the only way to discover whats going> > to break is to try. My advice from the beginning would be to restring,> > most times these old pinblocks are just barely hanging on anyway. I> > have seen a few, mostly French Herz, Erard and Pleyel grands where the> > block is collapsing forward and splitting at the stretcher, along the> > keyboard end line of tuning pins. These I will not try to tune,> > usually at that point the block is twisted enough that it is> > interfering with the action, now thats a joy.> >> > --Dean> >> >> > > -- > Duaine Hechler> Piano, Player Piano, Pump Organ> Tuning, Servicing & Rebuilding> Reed Organ Society Member> Florissant, MO 63034> (314) 838-5587> dahechler at charter.net> www.hechlerpianoandorgan.com> --> Home & Business user of Linux - 10 years> > _________________________________________________________________ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20090108/6b35fba1/attachment.html>
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