Duplex scale tuning

[Lance Lafargue]

On my last Mason and Hamlin job I marked the locations carefully with a
razor blade, then when reinstalling I put a drop of super glue under each
to hold them while I restrung.  It sounded great and you could hardly find
the razor marks.
Lance Lafargue, RPT
New Orleans Chapter
Covington, LA.
lafargue@iamerica.net

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> From: Granholm Bros Piano <gbros@term.wanweb.net>
> To: pianotech@ptg.org
> Subject: Duplex scale tuning
> Date: Tuesday, August 12, 1997 5:09 PM
> 
> List:
> 
> The recent thread on piano part terminology brings to mind a job I'm
> currently facing.  We have an old Kranich & Bach grand in for rebuilding.
> This piano has a duplex (aliquot?) scale, with little brass doohickeys
> (aliquots?) on the plate between the hitch pins and bridge, from the
> tenor/bass break all the way up to the final treble break.  I have
removed
> these brass pieces, which were held against the plate by string tension,
> and have carefully marked their positions on the plate, and we are now
> preparing to gild the plate, install it and restring the piano.
> 
> My questions:  What special steps, if any, do I need to take in order to
> tune the duplex scale?  Any special procedures as the piano is brought up
> to pitch?  Obviously, I put the doohickeys (aliquots?) back as I
restring,
> and tune the open wires below the bridge by nudging the doohickeys
> (aliquots?) back and forth, but isn't this tough to do with wire at pitch
> over the top of them, and won't that mess up the pretty new gilding job
on
> the plate?  With a piano of this quality, is the duplex scale really that
> big a deal anyway?  Should I just put the little brass doohickeys
> (aliquots?) back in their original positions and forget it, or what?
> 
> Thanks
> 
> John Granholm
> Granholm Bros
> Roseburg OR
> 
>