False Beats in the Temperament Section

[deanslist]

I'm looking for suggestions, guidance, admonitions, whatever, please. 

My piano for practicing tuning (and playing) is a 3 year old Pearl River upright (UP 118E, 47" ). It has developed murderous false beats in the temperament section making aural tuning practice impossible. The only thing I can really practice aurally at the moment is minimizing false beats in the unisons. There aren't enough intervals clean to let me get anywhere. All 3 strings on A4 are funky.  On many strings I just can't read a pitch with a resolution greater than 1 cent because of the oscillation. Some have a larger oscillation. I noticed it is much worse when the humidity increases. This piano does have a DC system that is always plugged in and working. 

Logically, I guess the first thing to do would be to seat the strings. This will be somewhat difficult because of the location bridge pins for these strings relative to the keybed. I have ordered Joe Goss' string seating tool to help with that. 

If I can't get it resolved, I'll certainly find the money in the budget to get someone from my chapter to come in and work on it. 

Thank you!

Sara Nash
Southeastern PA
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