Yamaha Tuning Instability

[Ron Nossaman]

>My son's piano teacher has a 1983 Yamaha G5 (6' 7") grey market piano. 
>Other than tuning instability, the piano is in VERY good condition. She 
>also has a 1930ish Aeolian 4'some" microgrand in the same room. I have 
>tuned both pianos several times at six month intervals. The Yamaha 
>consistently goes out of tune significantly more quickly than the 
>microgrand. No RH monitoring and no DC (on either piano). The Yamaha does 
>have business card gaps between the pinblock and the flange.


As I've mentioned a few times, "tuning instability" is non-informative and 
un-diagnosable without more information. What's the timing - month, week, 
day, hour, minute, as you listen??? What goes out of tune first or most 
drastically - unisons, bass, low tenor, killer octave, treble? This is a 
lot like getting one of those calls from a customer wanting the piano 
"fixed" because it sounds "bad", and asking for a price quote. I know 
you've been there.

Specificity, Bud! Input!

Ron N