FWIW...In "Under the Lid", in the stability chapter, Steve Brady thought the unfinished bridge cap would react to humidity changes more quickly than the finished soundboard but would have a much smaller effect on pitch... David Ilvedson, RPT Pacifica, CA 94044 ----- Original message ---------------------------------------- From: "William Truitt" <surfdog at metrocast.net> To: pianotech at ptg.org Received: 4/6/2010 2:50:28 PM Subject: Re: [pianotech] Pitch change, etc. >I find the idea of the epoxy laminated caps very interesting, in part >because of the difficulty in consistently getting good hard rock maple >bridge stock. I can't speak to the tuning stability, but it would seem >likely that the epoxy saturation would form a vapor barrier throughout the >wood, thereby negating the effects of humidity on the cap and any movement >of the wood associated with that. >I had wanted to roll my own epoxy laminated bridge caps for my last rebuild, >but was unable to find a supplier for the veneers required to make up the >pieces. I did chase one idiot supplier for 6 weeks, but could not get him >to send me the veneers before I gave up on him. >Any recommendations for a supplier, anyone? I'm starting a B in a month or >so that will get a new board and caps. >Will Truitt >-----Original Message----- >From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf >Of Ron Nossaman >Sent: Tuesday, April 06, 2010 1:59 PM >To: pianotech at ptg.org >Subject: Re: [pianotech] Pitch change, etc. >David Ilvedson wrote: >> "For instance, I've noticed, and it's been mentioned >> by others, that my RC&S rebuilds with epoxy laminated bridge >> caps stay in tune better than everything around them." >> >> How many pianos do you have out there, Ron? Sounds a wee bit >unsubstantiated...to me. >I don't know, a dozen or so of these. It's what I see in the >pianos I tune locally, and what techs I've done pianos for >tell me elsewhere. It's an observation I find interesting, not >something I'm ramming down your throat. >Ron N
This PTG archive page provided courtesy of Moy Piano Service, LLC