no tunings, no drivel

[D.Martens]

Hi Kjell,

>Could it be a movement in the plate`s middle-section?

Movements in the plate are the only cause I can think of, but I'm not sure
it's in  the middle section.

Duncan


-----Original Message-----
From: Kjell Sverre Fardal <ksfardal@online.no>
To: pianotech@ptg.org <pianotech@ptg.org>
Date: Wednesday, May 09, 2001 11:16 PM
Subject: SV: no tunings, no drivel


Hi, Duncan,

just some comments...:




Terry wrote:


>How would low pitch cause a piano soundboard to loose crown?
>
>"the pitch drops to a point at which there's risk of losing tone or crown"
>
>

Duncan wrote:

<It can happen to  large older European  uprights, when the pitch <drops to
a
<low point, or when strings are replaced on such a piano.
<It happened to me two times.
<I did not hear of this happening on smaller piano's or new piano's.

<Duncan

Could it be a movement in the plate`s middle-section? I just had a case like
that last week: Old German upright (Rönisch 130 cm / 1913). After
re-installing the plate (still without strings), I messured down-bearing,
and it was ca. 5 mm minus in the middle / tenor section! With the new
strings tuned up to 1/2 note below 440, down-bearing in the same section was
almost OK. When it was tuned up the last bit, down-bearing increased...

Then I consulted my collegues at the Scandinavian tech`s list (yes! Richard
B. is the most active guy, there too!), and got confirmed what I thought: a
movement (downwards) in the plate.

Kjell



Kjell Sverre Fardal   NPTF/Europiano
Kristiansand / Norway