Recycled Upright

[Erwinspiano@aol.com]

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Terry
  Do you want the post? I have plenty already. Come get  it I have guest 
quarters Yes the sides are maple................... like I  said 
E-V-E-R-T-H-I-N-G- GRIN.
    As you know the grain orientation on maple  (any wood) is prone to carve 
easily one way  but tends to splinter up the  other. SO all I'm doing is 
determining with some pre -chiseling which way  the grain on the  pieces in 
question are going to slice most  cooperatively & then glue them together in opposite 
directions.  The individual pieces are usually 1 to1 1/2 " wide so the 
resulting piece is  twice the width. Need a picture?
  all woods have a stated specific gravity & modulus  of elastisity based on 
a general density found in the species but As Hoadley  states the increase in 
density also means an increase in weight & density  & stiffness. I forget the 
percentage rate above the average for the species  but it was something like 
as much as 25%.  Increased density means  less string crushing over time &  
also less damping effect than a  softer variety. Perhaps this is erroneous 
thinking I still use the tightest  hardest stuff in the trebles & I like the results 
of the overall systems.  Isn't this one of the advantages  of the Terry 
Farrel thinly laminated  bridge caps assembled with epoxy is about?
   I know my country boy logic drives some folks  nuts but hey People say my 
pianos sound good.
  Dale Erwin

The sides were solid hard maple? I've never seen that - but I haven't  yanked 
that many old uprights apart. You are throwing the back out? Solid oak?  Why 
not use it? Make braces, fish, etc. out of it.
 
Can you better explain what you are doing with the treble caps? Reversing  
the grain?
 
Do bridge caps have meaningful impedance properties?
 
Thanks.
 
Terry Farrell



 

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