---------------------- multipart/alternative attachment Hi John, It's my understanding that for pitch raises, one raises 25% if tuning=20 all three strings of a unison at one time, and 33% if just tuning a=20 single string (and then getting the other two strings after all the=20 single strings are pulled up). Just do whatever works best for you.=20 At least in the second scenario, it sounds as if you're not=20 calculating the over-pull correctly. You could check the pianotech=20 archives on the subject - this would give you some more information. Concerning broken plates, you should read the Journal that covered=20 this subject in detail. Strings break before properly cast plates=20 do. You shouldn't be worried about breaking any more plates! Respectfully, Jon >(Dear list, I'm posting this again, hoping for a response.) >=20 I've been experimenting with an old pitch raising technique for=20 >instruments which are more than 30=A2 flat that works for me, but want=20 >to improve it and would like some feedback. >=20 I strip-mute the whole piano, over-pull the wound strings (3.5=A2=20 >max.), then taper the over-pull from +5.5=A2 in the tenor to as much=20 >as +10=A2 at C6and up. When I encounter an area of the piano that is=20 >more than 30 cents flat (that is, where I would be over-pulling by=20 >10 cents), I change over from tuning unisons to quickly and quietly=20 >tuning only the center string (+10=A2 max) without pulling the mute.=20 >Then go back to the unisons and continue with the pitch raise and=20 >the tapered over-pull. >=20 This quick pre-loading of the board before the actual "pitch=20 >raise" seems to get me to pitch faster (2 pitch raises max), and=20 >being one who has broken a plate in a client's piano=20 >by overstressing one area of the plate, it gives me a little more=20 >comfort when I'm doing a 100=A2 p.r. to have 1/3rd of the scale at=20 >pitch before pulling up the rest. >=20 I have also (unsuccessfully) experimented with this technique=20 >where the piano needed only a small p.r. (say, under 10=A2) and time=20 >was short. I don't know if this is just a bad idea, or if I'm not=20 >calculating the over-pull properly, but I'm far from the mark. >=20 How do I calculate the amount to over-pull that center string in=20 >the above scenarios, and what are the opinions of the second=20 >scenario? > >Thanks for the help. >John Tonyan Jon Ralinovsky Piano Technician Department of Music Miami University 513/529-6548 ---------------------- multipart/alternative attachment A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 2502 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/53/b1/1b/f8/attachment.bin ---------------------- multipart/alternative attachment--
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