<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=iso-8859-1" = http-equiv=Content-Type> <META content="MSHTML 5.00.2314.1000" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT size=2>Dear List,</FONT></DIV> <DIV><FONT size=2>   I know this stuff has been mentioned = before so please bear with me. I know there are several among you who it would = seem routinely install soundboards.</FONT></DIV> <DIV> </DIV> <DIV><FONT size=2>I have a friend who is about ready to set up his = shop for installing boards but he is not on the list. I told him it would be good = for him to sign on but I don't know if he has or not.</FONT></DIV> <DIV> </DIV> <DIV><FONT size=2>My questions to those of you with experience are as follows;</FONT></DIV> <DIV><FONT size=2>1. what are your thoughts pro/con on atmospherically = crowned boards</FONT></DIV> <DIV><FONT size=2>2. Is the other method, radiusing the ribs and = pressing the ribs/board into a caul of some sort?</FONT></DIV> <DIV><FONT size=2>3.(this one is my question)What do they mean when = they say 60ft radius as it applies to soundboard crown?</FONT></DIV> <DIV> </DIV> <DIV><FONT size=2>He seemed to think that Steinway uses the atmosphere = type method. I told him when I was there I didn't remember which method they = used but they had a very expensive machine for precisely cutting around the = perimeter of the board so that it would tightly fit the inside of the rim. Maybe that = tight fit, plus gluing onto a angled shelf, plus diaphragmatic taper all = contribute to their boards holding their crown. </FONT></DIV> <DIV> </DIV> <DIV><FONT size=2>Thank you for answering, I will save the messages = for him.</FONT></DIV> <DIV><FONT size=2>Doug Hershberger,RPT</FONT></DIV> <DIV><FONT size=2>Aliso Viejo, CA</FONT></DIV> <DIV> </DIV></BODY></HTML>