[CAUT] question

[Porritt, David]

There was an article in the Journal I think it was  August 2007.  Pictures, etc.

dp

David M. Porritt, RPT
dporritt at smu.edu

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Dr. Henry Nicolaides
Sent: Wednesday, April 01, 2009 8:20 AM
To: College and University Technicians
Subject: Re: [CAUT] question

Does anyone have a picture or diagram of this type installation? From where are the riblets available, or does one make their own?

Henry Nicolaides
Piano Technician
Southern Illinois School of Music
Carbondale, Illinois

henryn at siu.edu

________________________________
From: dporritt at mail.smu.edu
To: caut at ptg.org
Date: Wed, 1 Apr 2009 05:39:03 -0500
Subject: Re: [CAUT] question
I didn't.  The object (as I understand it) is to increase the stiffness of the board and the riblet is what accomplishes that.  The riblet is constructed so that the ends connect with the sounding board first and only after the screw is tight does the middle make contact.  I can't see that wedging up the board would add anything to the process nor do I think lowering the tension is necessary.

dave

David M. Porritt, RPT
dporritt at smu.edu<http://smu.edu>

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Albert Lord
Sent: Tuesday, March 31, 2009 9:03 PM
To: caut at ptg.org
Subject: Re: [CAUT] question

David,

Before gluing these riblets do you wedge up the soundboard
or lower string tension?

Albert Lord.
On Tue, Mar 31, 2009 at 11:50 AM, Porritt, David <dporritt at mail.smu.edu<mailto:dporritt at mail.smu.edu>> wrote:

The riblets helped both power and sustain.  To be sure I was going to be screwing the anchor screw into the bridge I drilled a very small pilot hole down through the bridge.  I put both holes spaced between two ribs and drilled so the screws would go between unisons and would not interest bridge pins.  Then from underneath I scrapped the lacquer off the sounding board where the riblets would be glued to it.  I then applied glue and screwed them on.
________________________________
David M. Porritt, RPT





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