[pianotech] beginner's calibration question

[Piano Boutique]

Zoe,

It just dawned on me that your 20 degrees and mine are different.   It's all relative, and good luck.

William

PS  I sure thought you worked in a cold shop.


  ----- Original Message ----- 
  From: Zoe Sandell 
  To: pianotech at ptg.org 
  Sent: Monday, December 28, 2009 5:16 PM
  Subject: Re: [pianotech] beginner's calibration question


  Thanks William

   

  I will absolutely file the fork- or else all piano tuning will be for naught!

   

  And I agree, consistency with how I bring it to temp. is important.- Before I file it, in fact I should do this.

   

  Zoe

   

   


------------------------------------------------------------------------------

  From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of William Monroe
  Sent: December 28, 2009 12:19 PM
  To: pianotech at ptg.org
  Subject: Re: [pianotech] beginner's calibration question

   

  Zoe,

  You must tune your tuning fork.  If the fork is flat, as in your case, you must take a metal file and file the tines of the fork very slightly to shorten them until it is vibrating at the proper frequency.  If the fork is sharp, file the crotch of the fork to lengthen the tines.

  It is important to take the preparation step of having the tuning fork at the temperature that you intend to use it.  Different folks use different methods.  Some leave the fork in their pocket for five minutes, some under the arm, some lay it on the plate to let it achieve room temperature.  I prefer some variant of the body temperature for calibration.  Whatever you use, though, be consistent, both when you calibrate/tune your fork, and when you tune the A (or C?) of the piano.  If your fork is too hot, it will be flat, too cold, sharp.

  Have fun!

  William R. Monroe



  On Mon, Dec 28, 2009 at 2:01 PM, Zoe Sandell <yiddishtangofever at shaw.ca> wrote:

  Hello,

  I have just completed calibrating my tuning device with NIST and the Tunelab
  demo-.  When I call back the C5 500Hz marks as in tune- ie squares stay
  still- but my tuning fork reads flat at A440

  How then do I accurately tune the temperament octave to the tuning fork-
  knowing this discrepancy?  Get a new/better tuning fork?

  Thanks
  Zoe

   
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