[CAUT] was caf now seasonal sb failure

[Greg Newell]

May sound like a beginners answer but have you 
checked the soundboard's glue joint connection to the inner rim?

Greg Newell



At 12:08 AM 3/1/2006, you wrote:
>The catastrophic action failure thread may have merged
>into a discussion of seasonal loss of crown/db and
>therefore I guess sustain/tonal quality.
>
>Here are observations about two terrible sounding NY
>D's I am servicing; Plus, a question about finding the
>culprit.
>
>#1. I went to a recital this evening at one of the
>univ. for which I do piano service.  The NY D (mid
>1970's era) was more dreadful than usual, particularly
>in tonal fullness.  There was the initial splatter of
>sound, quite thin and short, in octaves 5 and 6.  It
>sounds this way I guess at other times of the year but
>I really noticed it tonight sitting out in the
>audience.  When I tune, I zero in so much on the
>tuning that I turn off my voicing perception. There's
>no money in their budget for improvements at this
>time, unfortunately.
>
>As I sat there, I wanted to investigate, does this
>piano need, voicing or new hammers or a new board?
>Hammers have been replaced (by a previous tech) and
>aren't that worn.  The SB has a crack in it that is
>definitely more visible during this time of the year.
>Yesterday when I tuned somewhere here in the area it
>was 28% rh at 71 deg.  Could be a little different I
>suppose from location to location.
>
>#2. The second D, which is bothering me greatly is in
>a church.  It's also a 1970's model.  I put all new
>hammers and wippens in it replacing teflon parts and
>problems about 2 years ago.  I hoped for great
>improvement in tone.  While I got some, the piano
>still lacks power terribly.  I am in the process of
>adding keytop/acetone which is giving some help but
>still not what I want.  When I pluck a string it's not
>much or any different than the hammer strike.  A
>rocker gauge on the bridge of this piano indicates
>there is downbearing. This one has a Dampp Chaser, the
>univ. one doesn't.
>
>Do you always check crown/downbearing a particular
>way: under the board with a thread; rocker gauge on
>bridge; thread from agraffe to hitch pin; Lowell gauge
>or other? I used different methods, but wonder which
>gives the best reading.
>
>Bob Hull
>
>--- Ron Nossaman <rnossaman@cox.net> wrote:
>
> > > Regarding Steinway, the loose pinning (currently
> > 20% RH at
> > > this particular venue), coupled with raising the
> > hammer
> > > line several mm (key-dip; a very skinny .400")
> > brought
> > > about the dread CAF on several notes. (see Eric's
> > test)
> >
> > Something I've been meaning to ask. New York
> > Steinways, I
> > assume? 20%RH at 70° puts soundboards at 4.5%MC.
> > That's at or
> > below (depending on who you talk to) what they were
> > originally
> > dried down to for compression crowning with flat
> > ribs. There
> > shouldn't be a lick of crown anywhere in these
> > pianos in these
> > conditions, and they ought to be mostly killer
> > octave and
> > sound thoroughly terrible right now. Do they?
> >
> > Ron N
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>
>
>
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Greg Newell
Greg's piano Forté
mailto:gnewell@ameritech.net