humidity effect

[J Patrick Draine]

Don wrote:

> Hi all,
>
> I am still pursuing humdity effects on pianos.
>
> The piano:
>
> Young Chang G-157 (small grand) ten years old tuned four times in the last
> year.
>
> The conditions:
>
> Humidity on Feb 3 2000 was 22%
>
> Humidity Aug 1 2000 was 51%
>
> The observsation:
>
> In every 3 string unison the "bass wire" was significantly flat of the
> middle wire and the "treble wire" was significantly sharp of the middle wire.
>

Sounds like the pinblock has a horrible fit to the plate (flange &/or webbing).
Have you checked the flange fit?

Patrick