[CAUT] was caf now seasonal sb failure

[Greg Newell]

Bob,
         Sorry for the delay, but yes, that's 
exactly how I would check for it other than visually where you can.

best,
Greg


At 01:06 AM 3/1/2006, you wrote:
>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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>
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Greg Newell
Greg's piano Forté
mailto:gnewell@ameritech.net