[pianotech] Petrof Specs

[jrpiano]

Thank you Scott.
I have an action hand book someplace, but in my usual disorganized state, I couldn't find it.
John Ross
Windsor, Nova Scotia, Canada
jrpiano at win.eastlink.ca
  ----- Original Message ----- 
  From: Scott Gray 
  To: pianotech at ptg.org 
  Sent: Friday, August 13, 2010 5:08 PM
  Subject: Re: [pianotech] Petrof Specs


  Hi John,

  According to my Piano Action Handbook by Randy Potter, RPT The Petrof V (155cm/5'3") grand has a Key height of 64mm and hammer blow of 46mm. hammer let off of 3-1.5 mm and key dip of 10 mm.  In fact all the Petrof grands (V,IV,III) have the same specs.  The model II and I have a 10.5 mm Key dip.

  Scott Gray
  Montana
  sunlitedreams.com


  On 8/13/2010 1:54 PM, jrpiano wrote: 
    I need the help of the list again.
    I have a Petrof small grand I am trying to regulate.
    When I try hammer to string of 1 7/8" the hammer rests on the rail.
    When I measured the key height, it is 2 3/8" not 2 1/2".
    Anyone know what it is supposed to be?
    Thank you,
    John Ross
    Windsor, Nova Scotia, Canada
    jrpiano at win.eastlink.ca


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