Bridge pattern material

[David Love]

Even if the original bridge layout is relatively accurate, you're making a
copy of that and then copying that to the new bridge.  It's pretty easy to
move things around.  Offsets can be sensitive to even the smallest deviation
and speaking lengths in the upper treble too.  I think it's probably smart
to make a copy for reference especially if you want to know how much you can
lengthen or shorten a particular unison and still stay on the original body,
but my own experience has pushed me toward laying everything out from
scratch.   

 

Some of those Knabe scales seem to need a second look anyway with scale
tensions ranging from 120 lbs to 200 lbs per string in the plain wire
section alone.  

 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of erwinspiano at aol.com
Sent: Monday, February 25, 2008 9:09 PM
To: pianotech at ptg.org
Subject: Re: Bridge pattern material

 

 

    Obviously this can be true.... observing the bridge pin accuracy before
the piano is torn down will be a guide as to how successful the Mylar pattrn
will be & it is possible to correct the unison patches  that are grossly
layed out.  If the bridge is badly split as in D. Chadwicks Knabe, then
starting from scratch is the best outcome.

  Dale

  

With mylar patters you might just be copying someone else's mistakes.    

 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com <http://www.davidlovepianos.com/>  

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org
<mailto:pianotech-bounces at ptg.org?> ] On Behalf Of David Chadwick
Sent: Monday, February 25, 2008 4:48 PM
To: pianotech
Subject: Bridge pattern material

 

Greetings, 

I'm attempting my fist soundboard replacement a la Bolduc and I'm looking
for some Mylar to make the hole pattern in the bridges. I've been to arts n
crafts stores, office supplies and the big orange builders store (you know
the one) and all I can find is a 8x11 sheet product. Apparently I can get
this in a roll, as explained on the Bolduc soundboard replacement video with
Christian Bolduc, but what kind of supplier has this stuff. Even been to a
paper specialty shop but no luck. Any help would be greatly appreciated! 

 

David C. 

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