even more Dampp-Chaser thoughts

[Joseph Alkana]

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John,
Could you give us a little more info. Such as what type of system (parts =
and numbers if you have them) did you install. Is it installed in the =
recommended way, i.e., per the drawings at Dampp Chaser's web site? What =
part of the country are we talking about, and what are the normal =
patterns of humidity changes these past months.=20

If you have only a partial system -- heater bar and humidistat, (you do =
have one of those, don't you?) then my experience has been that the fall =
in humidity these past few months (inside buildings) has no effect on =
activating a de-humidifying only installation. Quite the contrary as the =
piano will have a tendency to drop in pitch, usually starting in the low =
tenor, reflecting a drying condition of the soundboard and the need for =
the humidifying part of the system.=20

Also describe where the piano is located, any extraordinary customer =
initiated circumstances. I.e., rug shampooing, water damage, environment =
changes, window treatments vs. the sun, etc. Did you check to make sure =
the outlet is not switch controlled? (Don't ask how I will always =
remember that scenario!)

No offense, but when you say you've been tuning it for two years =
regularly, what time intervals are we talking about?  When you say it's =
not any more stable, what are you talking about?  Only the unisons, or =
whole sections of the piano above or below where you left them last =
tuning. A properly installed, adequate Life-Saver piano system will =
usually not improve your unisons. significantly. (Note for the super =
techs: Yes, unisons may go out during humidity swings because of =
different overall string lengths, but only very slightly. John says "... =
how out the unisons were".)

More info please!

Joseph Alkana  RPT
josephspiano@comcast.net
  ----- Original Message -----=20
  From: Bec and John=20
  To: Pianotech=20
  Sent: Thursday, January 13, 2005 7:35 PM
  Subject: even more Dampp-Chaser thoughts


  Hi,

  It's been about 3 months since my first dampp-chaser installation. I=20
  did a tuning about 4-5 weeks after the installation. In addition, I =
did=20
  a big touch up of unisons and octaves mid-December.

  Just recently I checked this piano (a Boston GP-193) and was surprised =

  just how out the unisons were - I was expecting some noticeable=20
  improvement in the stability of the piano's tuning. Unfortunately I=20
  don't keep any kind of detailed notes about the state of the piano's=20
  tuning when I tune it, but from my memory (I've been tuning it for=20
  around 2 years, very regularly) it doesn't seem any more stable.

  Any thoughts from those with much experience with dampp-chasers?

  Thanks.

  -- John

  _______________________________________________
  pianotech list info: https://www.moypiano.com/resources/#archives
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