Bridge cap materials

[Erwinspiano@aol.com]

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In a message dated 10/19/2002 4:34:07 AM Pacific Daylight Time, 
mfarrel2@tampabay.rr.com writes:


> Subj:Re: Bridge cap materials 
> Date:10/19/2002 4:34:07 AM Pacific Daylight Time
> From:<A HREF="mailto:mfarrel2@tampabay.rr.com">mfarrel2@tampabay.rr.com</A>
> Reply-to:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A>
> To:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A>
> Sent from the Internet 
> 
>            Terry

                 I last thought as to your bridge cap material. Although it's 
important to have a tight bridge pin fit throughout the bridge the tightest 
hardest grain is most desireable in the top two sections.  I save the 
tightest grain  for this area. I replaced a cap on a 1920s baldwin this week 
that had  a decent grain  (12 14) throughtout) and they were as badly split 
up as the rest of the belly and I don't think it was a reflection on the 
grain just age and abuse. I spoke to wally brooks this week about the wide 
grain stuff. He stated that 12 grains was surely adequate for the bottom part 
of the bridge. It's also often easier to carve long notches. He gave me some 
help in the direction of finding tighter grain and understood my concern. but 
the box of Bolduc maple  I opened had almost nothing I'd use in the top end.
   Off to Yosemite!!!!!!!!!!!!!!!!!!!!
          Dale Erwin

> 
> You might want to consider turning down the turbothrusters on that 
> dehumidifier! Your cited climatic conditions will yield an equilibrium 
> moisture content of 3.1%. That is really dry - perhaps more dry than is 
> good for any piano - like the case, etc. And then hitting it with a heat 
> gun? I certainly could be wrong, but seems to me the heat is a bit on the 
> high side with this schedule.
> 
> Terry Farrell
>   
> ----- Original 


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