Andres punching tested

[gordon stelter]

Please explain the suspected mechanism behind tonal
change due to punching substitution.
     G


--- Jack Houweling <JackHouweling@dccnet.com> wrote:

> Hello Dale,
> Thanks for the update. Can't wait to hear the final
> results.
> 
> Jack Houweling
> 
> 
>   
> ----- Original Message ----- 
>   From: Erwinspiano@aol.com 
>   To: pianotech@ptg.org ; caut@ptg.org 
>   Sent: Wednesday, January 12, 2005 8:58 PM
>   Subject: Andres punching tested
> 
> 
>    List
>     While putting the final hours on a newly bellied
> D I did an experiment.
>      I had installed the usual Thick green punching
> a while back  prior to receiving the New Oorebeck
> front rail punching's. So I listened to the sound of
> F-4 carefully, checked the dip , then changed to the
> new ones, checked the dip , played the note & the
> sound suddenly came together with more power and
> clarity than the first punching. The solidity under
> my finger was firm and sure.
>       Thinking it to be an anomally I changed back
> to the green ones. The Sound diminsihed & lacked
> focus. Well ,I did this a bout three times on the
> same note with the same result. I then checked a
> bass note f-1 with the same effect. 
>      I'd say the new puncing  has a similar
> beneficial yet cumulative effect much like to mating
> & hammers to & leveling strings
>     I placed the green punching between two pieces
> of thin maple & put a calipers on each side. The
> compression with modest force would change easily as
> much as .030. The white new punching only .010.
>      Considering all this, since the key is where
> the power is generated  it needs to have a precise
> stopping moment. If not after touch can change to a
> depth of .420 even with an initial dip setting of
> .390 .(which is my preferred dip in Steinways
> whenever possible.) 
>     Think of the distance in excessive jack travel
> especially on parts with a narrow window for jack
> movement & also it's effect on slowing repitition
> performance. With the white punchings a far more
> dependable dip /touch can be assured.
>     Think of the improvement in SOUND Baby!!!!!!!!
>     I  noticed no change in noise even though this
> is a pressed felt & not woven.
>    I immediately changed the entire set & tomorrow
> or Friday I'll have a chance to hear & feel  the
> whole piano.
>     Regards
>     Dale Erwin



		
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