False Beats in high treble after stringing

[Dave Smith]

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Thanks to all who answered my post!!  I followed through the troubleshooting process recommended by Keith, I think, and finally ended up tilting piano, loosening treble strings, and using the epoxy and soldering iron trick recommended by Ron and Joe G.  Interesting to watch the epoxy wick down into the tiny space around the pins.  I used West System epoxy and the ultra slow hardener I had left over from my wooden kayak project.  Thanks to Phil Bondi also for coming out and helping me decide what to do.  

It worked!!!   Eliminated about 95% of the false beats.  Treble sounds pure and good.

Also CA'd some loose tuning pins while it was tipped.  That also tightened most of them very effectively.  Kind of messy, though, as my CA bottle would drop a drop here and there where I didnt want it.  Never did quite get this technique perfected, but it did work well.  Results just dont look quite as neat as I would have liked.  I guess this is why they call this "learning the trade".


Again, thanks and hope to meet some of you in Dallas.

Dave Smith
SW FL
  ----- Original Message ----- 
  From: Dave Smith 
  To: Pianotech 
  Sent: Monday, June 09, 2003 9:09 PM
  Subject: False Beats in high treble after stringing


  Just finished stringing my Wing and Sons upright piano project and have quite a few false beats in the last two octaves of treble in single strings.  My first restringing project.  Phil Bondi suggested that I ask on-list for advice.  The treble bridge seemed (to me anyway) to be in pretty good shape.  About 1/3 of the bridge pins were loose and I had removed and replaced after putting epoxy on the ends of the pins.  Also a little epoxy whereever there appeared to be any hints of small cracks near the pins.    Great results, except in certain strings of the high treble. Other than there, the piano sounds great.   I don't see anything different about these strings or the bridge from other strings, but I think I need to fix if possible.  For example, B6 center string has a beat of about 2 bps.  Not as loud as a real beat between two strings, but still THERE.   Some higher strings beat faster.

  I have experimented with seating the strings with my copper rod, at each bridge pin.  Also tried tapping each bridge pin in a small bit.  Doesnt seem to help, except in certain strings.  I did lightly sand and buff the v-bar before restringing, and think I have the right adjustment on the pressure bar.  I've been reading the archives and the PTG CD articles re false beats, but the number of "hits" for this search term is overwhelming.

  Can anyone offer me advice on what to do next to reduce the false beats, short of unstringing and recapping bridge, etc?  I would appreciate your help!

  Frustrated in Florida,

  Dave Smith
  SW FL

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