---------------------- multipart/alternative attachment List, After a long break I have returned to this fountain of um... knowledge. I would like some input regarding a rather strange Kimball console one of my technicians asked me to take a look at. I have some ideas as to what may be going on but let me layout what has been observed to date and get your reaction. What follows is the information provided to me from AC as he gave it to me. Kimball console # 865859 (1973), laminated soundboard. First service July 29, 2004, piano is 20 cents sharp. Has not been tuned in 2 years. I bring the piano to A440, and correct LM. (Lost Motion) Second service, March 15, 2005, on the music teacher's demand : piano is now 44 cents flat. Takes 4 passes to finally reach 0 (A440) as the piano rocks illogically to the pitches corrections. I noticed that the LM had come back, fairly excessively, to the point that I would do it again, but short of time, I did not mention this regulation to the customer, nor did I take action either to correct it. I however informed the customer that I would like to sample the tuning within a few weeks. Third service : April 7 , 2005. LM is still there and the same. The tuning has drastically changed in 3 weeks = A0 : + 24 cents (sharp); A1 : + 15; A2 : +11; A3 : +20; A4 : +20; A5 : +10; A6 : +8; and A7 : + 15cents sharp. ANR evaluates that unisons are in better shape than intervals. Apparently, the structure of the piano is good, no separation of the soundboard, but it flexes a little excessively under moderate pressure of the thumb, pressing on the medium rib. The back of the piano is against an inside wall, no ducts within 4 meters with the exception of a return (usually harmless) near the ceiling, above the piano. I do not recall excessive heat in the house during my visit last March. The house has central AC during the summer. This piano seems to be quite unstable. The climate here in Chicago has not varied that much in the last 3 weeks to have caused any significant climate driven pitch change. AC is a very conscientious tuner who uses a Veriturner and has always done solid tuning work for me. Obviously a DamppChaser may be helpful in this situation but I am puzzled by the severe instability. I checked the piano and all the plate screws are tight, the sound board is still glued to the stretcher, there simply doesn't appear to be any structural problems. In order to raise the pitch this amount in such a short period of time, a tremendous amount of moisture has had to be absorbed by the soundboard. But the climate hasn't changed enough in three weeks to really do this, besides none of the pianos in the store or shop have moved much at all in this same time period. Could the laminated board be the culprit in some manner? Any other ideas? I am stumped. Andrew Remillard ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/c9/04/ae/bc/attachment.htm ---------------------- multipart/alternative attachment--
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