Facts and nots : was Recommend Rebuilder?

[Delwin D Fandrich]

Some years ago in a couple of PTJ articles I did my best to explain the
technical problems associated with the compression crowning technique. Either
very few folks read them, folks read them but my explanations and writing style
were confusing, folks disagreed with what I wrote (though the facts are easily
verifiable in the pertinent technical literature) or, perhaps, we just forget. 

Perhaps it's time for someone else to take a stab at it.

Del
Delwin D Fandrich
Piano Design & Manufacturing Consultant
620 South Tower Avenue
Centralia, Washington 98531  USA
Phone  360.736-7563
<mailto:fandrich at pianobuilders.com> 

| -----Original Message-----
| From: pianotech-bounces at ptg.org 
| [mailto:pianotech-bounces at ptg.org] On Behalf Of David Love
| Sent: March 22, 2007 7:33 AM
| To: 'Pianotech List'
| Subject: RE: Facts and nots : was Recommend Rebuilder?
| 
| What's worse, a compression crowned board that possibly 
| didn't crown and has no compression ridges, or one that did 
| and does?  Goes with the territory and therefore there might 
| be some truth in what they say.  Whether it's
| stable over time is another issue.     
| 
| David Love
| davidlovepianos at comcast.net
| www.davidlovepianos.com
| 
| -----Original Message-----
| From: pianotech-bounces at ptg.org 
| [mailto:pianotech-bounces at ptg.org] On Behalf Of Porritt, David
| Sent: Thursday, March 22, 2007 7:00 AM
| To: Pianotech List
| Subject: RE: Facts and nots : was Recommend Rebuilder?
| 
| Andrew Anderson said: "Steinway bluntly says in their 
| technical reference manual for technicians that compression 
| ridges are not a problem and are a sign of a good board under 
| ideal compression."
| 
| So should we be disappointed if we get a piano that doesn't 
| develop compression ridges?
| 
| dave
| 
| David M. Porritt
| dporritt at smu.edu
| 
| 
| 
| 
|