---------------------- multipart/alternative attachment In a message dated 12/18/04 5:48:46 PM Pacific Standard Time, kam544@gbronline.com writes: > > >> Salutations, >> >> I've got some regulation problems on a 50 inch Mason upright from the 70s. >> I've worked on other Aeolian uprights of that vintage, and some of them >> have the same problem. >> > >> The initial problem was that the keys weren't bottoming out on punchings. >> It seems that it's been that way since new(though they bought it used). >> There was a huge gap between the bottom of the key and the punching when the >> key was depressed. This led to hammers blocking, bobbling, and a feel that >> could only be described as spongy. > > > Something is preventing the keys from contacting the front rail punchings. > Whatever it is, I'd be looking to find out. > > >> At my last visit, I added punchings, and improved the feel somewhat, but >> some of the bobbling is still there. I also had to increase letoff distance >> in some areas of the keyboard an unacceptable amount to get it to work >> without hammers blocking against strings. >> >> I think that the main problem is that the key height is too great. It was >> somewhere around 70mm, though I forgot to write it down. More precise >> measurements are necessary, and they will be forthcoming after my next visit >> there in January. Blow distance is at 1 7/8(the only thing in the piano that >> > > > Taking the measures you is not going to solve the problem. > > > >> I tried lowering the key height on a few sample keys by removing balance >> rail punchings, but there was nowhere near enough aftertouch. Should I try >> increasing blow distance to 2 inches or more? Any ideas??? > > > Increasing blow distance is only going to exacerbate the situation. > Decreasing the distance will enhance aftertouch. > > > Find the reason for, "... There was a huge gap between the bottom of the key > and the punching when the key was depressed ...", and all will be revealed. > > > Keith > Keith, That's what's been causing me problems. I've searched and searched, and I can't figure it out. I've decreased blow distance, and there was not enough aftertouch and bobbling hammers regardless of how I tried to regulate it. I'll try to get back over there sometime early in the new year and see what I can figure out. Very frustrating piano. Thanks for the input. Dave S. ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/fa/5e/3a/86/attachment.htm ---------------------- multipart/alternative attachment--
This PTG archive page provided courtesy of Moy Piano Service, LLC