Clang

[Isaac sur Noos]

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Hello Dale,

Interesting comments, is not condition 1 providing the back bearing only
effect I think about (plate lowered, weak crown or distorsed board).

I suspect that the lack of firmness in front termination is giving that loud
klang tone, without power problem because the downbearing (stiffening of the
board ) is yet provided.

I know fairly well condition 5  ;>)

Greetings

Isaac OLEG

Entretien et reparation de pianos.

PianoTech
17 rue de Choisy
94400 VITRY sur SEINE
FRANCE
tel : 033 01 47 18 06 98
fax : 033 01 47 18 06 90
cell: 06 60 42 58 77

  -----Message d'origine-----
  De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la
part de Erwinspiano@aol.com
  Envoye : samedi 18 octobre 2003 18:12
  A : pianotech@ptg.org
  Objet : Re: Clang


  In a message dated 10/17/2003 9:33:55 PM Pacific Daylight Time,
Erwinspiano writes:
      is is a piano that is relatively recently strung and still shows some
      crown in the middle, maybe 1/16".  Since I don't know how the bearing
was
      set, what combinations of board/bearing settings might also contribute
to
      this.
      David , see condition 3 below as a perhaps


      I would be interested to hear what combinations generally produce what
      kinds of tone as a diagnostic tool.  For example:

      1. A board with weak crown that has excessive bearing.
       2.A board with good crown but too light bearing.
       3.A board with weak crown and light bearing. (or no bearing)
       4.A board with good crown and excessive bearing.
       5. Also Unevenly set bearing pressure.
        1. Actually sometimes not too bad but can have weak treble due to
reversed crown under the trebles. Seen sunken bridges & deformed board S&S
A -2
       2. Only fair sustain not as much power or woof to the sound. I've
seen this in a ( 9ft. Kawai)
       3. Weak sound that breaks up & commonly shows particular impedance
problems in octave four & elsewhere. Loud or distorted attack or thwack as I
call it.(could be clang?) Can't be voiced out or to blend. Lots of old S&S's
especially L'S & O's
        4. Tends to sound choked for power but can still illicit some
sustain with a harder /heavier hammer & careful voicing. Don't see this much
       5. Weakness in the offending area. I've induced this myself once in a
S&S A-3 with new board. Repairing the bearing uniformity fixed the tonal
problem.
      ANybody else?
       Dale

      David Love
      davidlovepianos@earthlink.net


      > [Original Message]
      > From: Bill Ballard <yardbird@vermontel.net>
      > To: Pianotech <pianotech@ptg.org>
      > Date: 10/17/2003 8:36:35 PM
      > Subject: Re: Clang
      >
      > At 7:30 PM -0700 10/17/03, David Love wrote:
      > >What in a soundboard, crown, bearing, etc., can cause a kind of
clangy
      > >tone.  Decent sustain, but kind of a clang.  Old board, new softish
      > >hammers.
      >
      > Usually, a loud attack signals a board  too soft (ie., lacking in
the
      > impedance necessary to tame the flow of energy from string to
board).
      > What does the crown look like?
      >
      > Bill Ballard RPT
      > NH Chapter, P.T.G.
      >
      > "All God's Children got Rhythm"
      >      ...........Ivy Anderson in "A Day at the Races"
      > +++++++++++++++++++++
      > _______________________________________________
      > pianotech list info: https://www.moypiano.com/resources/#archives

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