Hello List First of all, thank you very much for all the answers, everybody helped a little, and every answer is worth taken in consideration, if it is not usefull now it will be in a future. I just came back from what I think is the solution to the problem. First I am going to answer to some of your questions, Yesterday i was mute, because I formated my hard disk to install Win98 full (not the upgrade) (Very satisfactory ) BopPiano@aol.com wrote on 08/29/98 >First, I would look for drafts (is there an air conditioner or other situation causing fluctuation) No air fluctuation, no air conditioning. >Next, are the plate bolts adequately tight ? I checked them today, Yes Avery wrote on 08/29/98 > the tightness of the plate screws. Ok >you might also take loose some strings to check the tightness of the bridge pins. I checked it today, all ok Newton wrote on 08/30/98 >What you are describing is behavior common to changes in humidity. That is what had me puzzled, the area where the piano is, is a dry area and the owners said that was always like this. Joe Goss wrote on 08/30/98 Elian, >Just curious as to your method of tuning, Is it middle string then outside, left to right. This could be a factor if >there is not enough room for the strings to move without friction on their neighboring. >Joe Goss I have several methods, I tune auraly when I donīt have to change pitch or piano is stable starting with a felt covering 2 central octaves I tune them using fifth and fourth and check with thirds and 12th and folow to tune upurds to the trebble and finally centre to bass, For this piano, I used a Yamaha PT 100II tunning as you said the first two tunnings, and tunning higher, and afterwards I tuned auraly about 8 more times, to the date, anyway it was not the tunning as I have several Yamahas that hold even for more than a year with a satisfied customer. BopPiano@aol.com wrote on 08/30/98 >This would be typical of climatic fluctuations especially if the bass stays very close to where it was left. If, >from string to string After checking everything again today I really became convinced that something was happening there and nobody told me about, so at the end of my inspection, I tuned the piano again, and I had my customer to come and talk to me. Roger Jolly wrote on 08/30/98 >It would be well worth while to take a hammer shank and lightly tap all the strings to the bridges. I have never >seen bad coils on Yamaha's but this is worth a visual check. Tried it also today... ok Jon Page wrote 08/30/98 Elian, >1/2 beat ? So what. In how long ? A week apart >Maybe this piano needs a longer time period to settle since it was neglected for so long a time. How many >tunings have you given it since it was pulled up? about 8 , 9 with today I think I pretty much covered the questions, now, here is what I found. Once my client arrived, I exposed him with all the facts, and I told him that the piano was in excellent shape, that there must be an outside effect. He thought about it and said he couldnīt make out what, Then arrived the pianist, his daughter. I told her what I tried, and that everything showed that the piano was affected by climate or humidity, and GUESS WHAT. The Daughter, has respiratory problems, and sometimes practices the piano with an electric vaporizer near by, which lets out lots of steam. Imagine jumps in hummidity from around 50% to 90% back and forth. And no one was aware of that, In fact if I donīt insist, the didnīt notice this fact. At least, I hope that is the reason, I told them not to use the vaporizer in the room, and I would go and check on the piano in two weeks time. Elian Degen
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