[pianotech] Unstable tuning on Everett model 11

PIANO2NR at aol.com PIANO2NR at aol.com
Thu Jul 14 20:07:04 MDT 2011


Hello all, hope some one can help!!!
 
Octave 5 just above the tenor strut for about 8 or 9 notes just keeps  
changing and going flat.  At first I suspected a crack in the plate at the  
hitch pin area.  Close inspection revealed no crack that I could see.   There 
was a small separation (about a 16th") between the pinblock and three  treble 
back posts which I have seen quite often on these 45" studio  uprights (my 
own Everett included).  I clamped the back together and  removed the long 
screws at the top of the plate and installed 3/8" carriage  bolts. It closed up 
the separation completely.  I checked the pressure bar  screws to see if 
they were stripped and was able to get about 1/2 turn on ones  in the suspect 
area and the pitch came up 20-30 cents in that area. But they  were not 
stripped.
 
Ah haa, problem solved I thought.
 
I lowered the pitch in octave 5 back down and tuned the whole piano.   The 
next day the customer called and said those notes were very out of tune  
again.
 
No obvious separation of bridges and no cracks in soundboard.  Any  ideas 
on what I may be missing???
 
Randy Mangus, RPT
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