Lacquer fight! Lacquer fight!

[Isaac OLEG]

Indeed Richard, it is not only that the ratio fundamental/overtone is
changed, but I feel it like the fundamental is powered and then takes
the higer parts of the spectra with him. (very esoteric description !)

The tone opens and warms, but it opens also when the cushion is build,
assuming we don't loose tension doing so.

If one look closely at the layers of felt within a hammer one will se
that releasing the fiber above the stables goes directly under the
crown , around 11:00 an in the internal layers of the hammer, without
changing the outer core state much. It brings up the whole shebang,
but I feel mostly that the fundamental is powered, taking the highest
partials with it. I indeed prefer a tone that is driven by the
fundamental than by the highest partials, it is way more forgiving and
useable


I feel that not much tension is added with battery needling, but all
depends of the initial state of the cushion zone of course, the
tension within the hammer is certainly driven up .

Experiences I will make will involve making pencil lines on the side
of a hammer and needling in the battery, in the cushion and near the
crown. I'll take pictures and I bet we will see where the move occur.

Slicing hammers before and after battery needling should be
interesting as well

Best regards to all.

I' am back to the laboratory

Isaac O



-----Message d'origine-----
De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la
part de Richard Brekne
Envoyé : dimanche 9 mai 2004 15:36
À : Pianotech
Objet : Re: Lacquer fight! Lacquer fight!


Erwinspiano@aol.com wrote:

> In a message dated 5/8/2004 4:58:46 PM Pacific Standard Time,
> oleg-i@noos.fr writes:
>
>     So we can have a hammer that have a lot of tension, a very rich
>     rebound and a lively tone at all levels, but still miss some
basic
>     power for sustaining tone and carry the timbre at forte levels.
>     Battery needling gives that, densifing the bottom of the
shoulder
>     and the felt under the strike point, but  it does not add lot of
>     tension, so it is of course better to begin with a hammer having
>     enough.
>
> *     >> Really, Isaac , with all due respect, What you have is
> mostly felt in compression not much tension. Battery needling is
> releasing very densified compressed felt which in turn allows the
felt
>  more spring which does drive the fundamental.  I tried in my last
> post to comminicate what tension is but I guess I used the wrong
words
> or something . I thought I was clear.*
>

But this is simply not what battery needling does.  If it just
released
compaction.. then the hammer would simply puff out at the point of
needling... and nothing else... you probably wouldnt even hear any
change.  Further battery needling does not simply result in driving
the
fundemental more.  That is consistant with needling down not needling
up.  It opens the sound and produces a stronger fuller sound spectrum.
Yet it lacks the effect one would get of simply adding a drop or two
of
hardner to the crown.... i.e. just getting brighter, a bit louder...
but
no increase in body.


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