[pianotech] Pitch change, etc.

[William Truitt]

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