[CAUT] question

[Barbara Richmond]

I've seen the riblets listed in the Journal classifieds. 



Barbara Richmond, RPT 

near Peoria, IL 


----- Original Message ----- 
From: "David Porritt" <dporritt at mail.smu.edu> 
To: caut at ptg.org 
Sent: Wednesday, April 1, 2009 8:33:44 AM GMT -06:00 US/Canada Central 
Subject: Re: [CAUT] question 




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 




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 > 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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