sudden whistle (6th partial)

[Newton Hunt]

What comes to mind are a few things.  

String leveling may help here.  If the other partials are out of phase
with each other except the 6th partial then it may stand out.

Damper seating on this note may be poor.

A G#6 open aliquot may be activated sympathetically.

As to why?  Very likely a change in humidity happened at just the wrong
time.

		Newton

"Dorothy A. Bell" wrote:
> 
> Dear Friends,
> I have been informed that a small Asian (Hazelton/K&C) piano that I had
> seen two weeks ago has developed a "funny noise," and indeed it has: I
> can hear over the phone that when C#3 is struck, G#5 sounds, almost as
> loud as the fundamental. It's only on that note, and "it happened right
> after you were here."
> When I was there I tuned, regulated strike and letoff, removed the
> action and lubricated flange pins with Protek, and eased keys at the
> front pins. It all seemed unremarkable to me, and I didn't hear any
> 6th-partial ring on C#3.
> What have I done? What has the piano done? What can I do? Questions of
> strike point come to mind, but I don't want to start fooling with that
> just on a whim, and why would it have changed anyhow.
> Many thanks for any ideas --
> 
> Dorrie Bell