This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment I meant to write "even with overpull"... David Ilvedson, RPT Pacifica, California Original message From: "David Ilvedson" To: pianotech@ptg.org Received: 12/20/2005 2:34:55 PM Subject: Re: How to explain a pitch adjustment An 8 cent change in tension will result in at least a 2 cent deviation.= If with overpull...that's not fine tuning. I figure a 3 cent chang= e is pushing it.... David Ilvedson, RPT Pacifica, California Original message From: "Cy Shuster" <741662027@theshusters.org> To: Pianotech Received: 12/20/2005 2:24:20 PM Subject: Re: How to explain a pitch adjustment I measure pitch on all the A's before I start, and record this for the = customer on a graph on the invoice. This gives them a great visual abo= ut what work is needed. The graph indicates "fine tuning" range (+/1 e= ight cents for me). The analogy I use is sanding: if wood is very rough, you can't start wi= th the 1000-grit paper; multiple passes are required. Same thing for p= ainting: with regular maintenance, one coat covers, otherwise you may n= eed several. A description of the forces involved helps: 15 to 20 tons of tension ov= erall; a pitch raise can add a ton of tension (right?), yet a fine tuni= ng requires < 1% accuracy. No wonder it doesn't last! --Cy-- ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/f6/29/cc/5d/attachment.htm ---------------------- multipart/alternative attachment--
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