Problem -- have you ever seen this?

[Tom Sivak]

I got it!
   
  Maybe your unison on C3 is out.  Way out. Out like one of the bichord strings on C3 is a half step flat.  Then the two strings of B2 would vibrate in sympathy with the mistuned C3 string.  But...only when the sustain pedal engaged! 
   
  Tom Sivak
  Chicago

PIANOTECHNICIAN at aol.com wrote:
      I have a customer with a Petrov upright, about 7 years old. The problem is in the bass section. When you play C3 loudly with the sustaining pedal down, you hear a bit of the B next to it. The problem is NOT caused by the hammer being misaligned and striking part of the B bass string - -the hammer is nowhere near the B string. In fact, BOTH strings of the B note are vibrating when the C note is played loudly. I've never seen this problem or heard of it in all my years in business. Any ideas?
   
  Jesse Gitnik
  Since 1980



    
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