[CAUT] Andres punching tested

[David Ilvedson]

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Yes.   They seem similar to scrap hammer felt...
David I.








Original message
From: Fred Sturm 
To: College and University Technicians 
Received: Fri, 14 Jan 2005 07:42:15 -0700
Subject: Re: [CAUT] Andres punching tested


Is Andre=92s punching firmer than Pianotek=92s =93pear green=94? (Which=
 is quite similar to Yamaha, etc).
Regards,
Fred Sturm
University of New Mexico

On 1/12/05 9:58 PM, "Erwinspiano@aol.com" <Erwinspiano@aol.com>=
 wrote:


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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