Don: Is this true of Kimball consoles? I do not recollect them having full perimeter plates, but I don't have one on hand to double-check that ----- Original Message ----- From: "Don" <pianotuna@accesscomm.ca> To: <pianotech@ptg.org> Sent: Friday, February 08, 2002 8:09 AM Subject: Re: Wierd Pitch Raise Results > Hi Terry, > > Most of the laminated boards also have full perimeter metal plates--it is > the plate flex that makes the difference not the laminated board. > > At 08:25 AM 2/8/02 -0500, you wrote: > >Thank you. That's an interesting thought. I'll have to pay closer > attention to laminated boards. Yes, this one had a hunk of plywood down there. > > > >Terry Farrell > > > >----- Original Message ----- > >From: "Patrick C Poulson" <pcpoulso@pacbell.net> > >To: <pianotech@ptg.org> > >Sent: Friday, February 08, 2002 12:29 AM > >Subject: Re: Wierd Pitch Raise Results > > > > > >> Terry: Check to see if the piano has a laminated sound board. In my > >> experience a piano with a laminated board needs significantly less over > >> pull. I assume that this is because the board itself is stiffer due to the > >> cross grain and layers of glue, and doesn't flex as much as a solid board. > >> I also use a SAT, but in these cases I modify my pitch raise technique. In > >> the middle section, rather than tuning the unisons as I go, I mute off the > >> strings, pull just the center strings up to pitch up throughout the tenor > >> section, and then go back and pull in the unisons. The upper treble and > >> bass I tune as usually. This usually brings the pitch raise in as close > as I > >> typically get normally. I also use this procedure on spinets and it works > >> well on them too. > >> I hope this helps. Patrick Poulson, RPT > >> ----- Original Message ----- > >> From: "Farrell" <mfarrel2@tampabay.rr.com> > >> To: <pianotech@ptg.org> > >> Sent: Thursday, February 07, 2002 8:50 PM > >> Subject: Wierd Pitch Raise Results > >> > >> > >> > Half the piano I tune require a significant pitch raise. I do a lot of > >> pitch raises. I use a SAT III. Almost all my pitch raises come out really > >> close to target. > >> > > >> > BUT. Some don't. Today I pitch raised three pianos. An Aeolian spinet > >> (what junk!) was raised 30 cents - came out real close to target. A German > >> F. Weber old upright - raised 80 cents and came out right on target. > >> Yesterday I did 60-cent pitch raises on six P22s (and tuned them - new > >> tuning output record for me! - also a new one-day income record for me! :-) > >> !!) - all came out right where I wanted them. > >> > > >> > I also pitch raised a 1973 Kimball console today. The piano was all over > >> the place tuning-wise, but was only about 5 to 10 cents flat on average. I > >> made the small pitch offset correction as usual with the SAT, and after the > >> pitch raise pass, the ugly son-&%-$-$#%&@ was a good 15 to 20 cents sharp. > >> WHY? I went through it again without any pitch correction (the piano should > >> have ended up perhaps 5 cents sharp) and every thing was like at least 10 > >> cents sharp! > >> > > >> > Is this like some loosey goosey piano or what? Was I having an acid > >> flashback? I takes a lot to get me riled up while working on a piano, but > >> this one pushed me close to the limit. > >> > > >> > Ever see anything like this, or is it more likely that I was just tired > >> and screwing up big time? > >> > > >> > Thanks. > >> > > >> > Terry Farrell > >> > > >> > > >> > > >> > > > > > > > >
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