[CAUT] was caf now seasonal sb failure

[central]

Greg, Ron, and other Soundboard Experts,
      If you do find a soundboard to rim crack with chunks of aging excess
glue collar flaking away, and you don't want to rebuild it what then?  Will
thin CA glue squirted into the crack do anything to restore tone?
-Mike Jorgensen


On 3/1/06 2:09 PM, "Greg Newell" <gnewell@ameritech.net> wrote:

> 
> 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
> 
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