[CAUT] was caf now seasonal sb failure

[Bob Hull]

Good idea to check this.  Is this best checked
underneath the SB with a palatte knife or similar for
a solid connection between the two?  

I know SB crack is in some sense a cosmetic
distraction, but does speak about how dried out the
board is getting to cause separation.

Bob Hull

--- Greg Newell <gnewell@ameritech.net> wrote:

> 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 
> 
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