Facts and nots : was Recommend Rebuilder?

[RicB]

Del just reminded us of his article series on the subject, and as I 
understand the reasoning and what factual material he presents, 
compression ridges are simply bound to form in significant numbers 
whenever the compression crowned soundboard method is used.  CC boards 
and variants have been made for-like-ever so either Del is wrong, which 
he isnt, or ridges have been around as long as boards have been made 
this way... and quite likely in similar numbers.  Better materials in 
the past (if thats indeed true to begin with) could perhaps influence 
that picture somewhat... but the principles of compression crowning 
remain the same.

Cheers
RicB


    I guess the older Steinways were not manufactured correctly, as I don't
    recollect any mention of this before.  So obviously, they just
    learned to
    make them correctly. :-)
    John M. Ross
    Windsor, Nova Scotia, Canada
    jrpiano at win.eastlink.ca