[CAUT] Tuning stability

[Chris Solliday]

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I have serviced one particular Bosie 200 in a one of my contract schools =
since 1979. It was always going through contortions and the soundboard =
and pinblock were a mess before the Dampp Chaser complete system without =
cover was installed. That helped some when the thing was plugged in =
continuously and maintained which was intermittent. Two years ago we put =
in a new board and block and replaced the action too, yes dampers and =
some other stuff too. Since then it has gone through contortions, =
athough the soundboard and pinblock are not a mess and the climate =
control system was updated but no cover installed (im still considering) =
yet. The maintenance intermittancy and power cord issue continues,but I =
will say that when the plug stays in and the bucket is filled and the =
tunings are one or two a quarter it doesn't stay put too badly. It is =
better than before. The pin block was particulary a mess when removed. =
Some stability in design was added. The board ribs were midified =
slightly. But afterall I'd have to say that the biggest factor in why =
these otherwise good pianos go out of tune more frequently in changeable =
climate conditions,than say Steinways,is the rim construction. Oh yeah =
Roger's right. Chris Solliday
  From: Avery Todd=20
  To: College and University Technicians=20
  Sent: Tuesday, March 15, 2005 12:06 PM
  Subject: RE: [CAUT] Tuning stability


  Roger beat me to the punch about the rim. :-) I once had this kind of =
problem with a Bose in a private home. I tried everything I could think =
of, to no avail. Everytime I went to tune it, it needed at least a =
partial pitch raise.=20

  Since I knew the house had one, I finally asked how long it had been =
since the climate control system had been checked. He said quite a =
while, so I recommended he have that done. He did. It wasn't working. =
Was repaired. No more tuning problems! I found out about the rim later =
when talking to Roger W. @ Bose/Kimball.=20

  Avery=20

  At 10:25 PM 3/14/2005, you wrote:

    At 09:28 PM 3/14/2005, you wrote:

      Those pianos are just very sensitive to changes in humidity.  I'm =
not sure why but I think it has to do with the type of rim construction. =
 I vote for a full system (and more frequent tunings, of course).
      =20

      David Love
      davidlovepianos@comcast.net=20



    Hi David,
                      This piano has a Spruce rim.   The soft wood is =
way more sensitive to humidity changes.   So perfectly normal.  Yes you =
are correct in your advice.   Full Damp Chaser System with bottom cover, =
 More tunings.

    Regards Roger 
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