Yup, Already had that problem and a short concise conversation with Bill Youse (sp?). He mentioned using a rubber mallet to seat the cross-strut and tightening the screws down. Did both and the screw didn't move or help so I seated it with thicker CA. (cringe, I was desperate with an artist breathing down my neck) It worked fine. Will probably take a solid tap to get it out now, but then who and why would it be removed? Andrew Anderson At 01:07 PM 10/8/2007, you wrote: >Well, its not anything to do with the longitudinal mode. For such a >high string thats out of the question. You might check the cross >strut. I had a D here in town that was causing a similar sound on >C6. Only C6 would excite it... but when you played C6 reasonably >hard boy was that buzz loud. Three techs tried different things >including one who decided to mash the strings into the bridge >surface in what was the most aggressive string seating job I've seen >in a long time. Another tried tightening the <<bell>> screw which >very temporarily fixed the problem... which pointed me in the >direction of the cross strut when I got finally called. A bit of >banging around with the palm of my hand and I found that the cross >strut was the culprit. I ended up removing the thing, bushing the >ends with some thing felt and reinstalling it with as tight a screw >as I could get. Problem disappeared permanently. > >Buzzes can come from all kinds of places however... in and out of >the instrument... and you could swear you hear where its coming from >and be totally wrong. Hinges are likely culprits as is the lock mechanism. >Good luck hunting it down. > >Cheers >RicB > > > I tuned this piano again a few days later for a master class. The > lid had been restored and the percussion equipment was all gone by > that time. I could not find that elusive buzz anymore. Either > something in the hinges (hinge-pins?) was sympathetically vibrating, > or more likely the snares right up close to the rim were doing > it. Funny thing is, I could of sworn it was coming from inside the > piano. > > Chalk another one up to "experience" > Andrew Anderson > > At 07:36 PM 9/30/2007, you wrote: > >All strings of the unison excited the same short buzz about an > >octave +. Had me chasing around a while for something but I > >couldn't isolate a sympathetic resonance. I didn't think of lifting > >because all three were making the sound. I could try it. I did > >lift and level these strings last year. The piano is on full > >climate-control with a cover most of the time and there has been > >very little variation in pitch. I noticed it today with the lid > >off. It was right next to the snares but the sound sure seemed to > >come from within the piano. I'll have to check again when the > >orchestra instruments are distributed back to their classrooms/owners. > > > >Andrew Anderson > > > >At 03:36 PM 9/30/2007, you wrote: > > > >>>Tuned a D this afternoon to prep for this afternoon's > >>>concert. A#6 had a short buzz a harmonic above the note. I could > >>>not find an offending duplex (front/back) to mute. Would this be > >>>a longitudinal mode? Got any ideas to chase this one down? > >>>Andrew Anderson > >> > >>Hi Andrew, > >>I'd think not. The longitudinal would be way up there in pitch, and > >>I'm not sure they're even audible that high in the scale. Did you > >>isolate unison strings to see if only one made the noise? I'd try > >>repositioning the strings a tad, and lifting and leveling that > unison. > >>Ron N
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