---------------------- multipart/alternative attachment Dave I think 2 things occur here. Yes as you say it is the soundboard If it's got enough crown could push tenor strings sharp but I may be a tension differential in the plate & what you wrote about the dramatic cents change makes me nervous. Ie done this many time when re-stringing a bass section but not as you describe. A bass section has far more inherent tension in it but less effect from the board. I wonder about the plate distorting. I'm thinking out loud but as the treble strings come off the board does come up but also the tension being released might allow the entire tenor go sharp as plate decompresses & pulls the other strings sharp so to speak. I dunno Dale Over the winter break I have re-strung the top two sections of 2 concert grand's that were getting in the habit of breaking treble strings far to frequently. I've done this many times on the practice room pianos. We've discussed this before with regards to the uneven tension when two sections are done and tension is left on the rest of the piano. Just out of curiosity when I got the treble strings off, I measured the pitch of C5. It was 76-cents sharp. After I installed the new strings and put enough tension on each unison so it didn't sound funky and enough to keep the coils tight I measured again and C5 was down to just 16-cents sharp. I then chipped twice and measured again and C5 was down to just 4-cents sharp. By the time I started to actually "tune" it, C5 was just barely off. Since the sounding board could raise the pitch that much, is this a good indication that it has not suffered terminal compression set? It would seem to me that the board would still have to have some life in it to do that. Ideas?? dave ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/50/e7/e7/d0/attachment.htm ---------------------- multipart/alternative attachment--
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