more notes on humidity change

[Don]

Hi all,

Another piece to add to the puzzle of humidity control.

The piano:

Samick 121 cm (48 inch for the metrically challenged)

The humidity 57%

The piano is equipped with a full dc humidity control system (vintage 1996)

Problem:

D#3 (first plain steel) was 13.75 cents sharp and A4 4.5 cents sharp

Diagnosis:

"drier bar" burned out.

Solution:

Replace drier bar.

Results:

After 30 days the pitch at A4 was -0.63 cents and D#3 was -3.4 cents

So pitch change in total at A4 was over 5 cents and at D#3 was over to 17
cents.


Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
Non calor sed umor est qui nobis incommodat

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