[pianotech] Yamaha C7 scale

[David Love]

Larger wire will raise the inharmonicity and often creates more of a honking
type noise because of the lower tension/lower BP.  Smoothing things over
will be a choice of less bad more than what is good.  Send it off to someone
to look at who can calculate it out.  

David Love
www.davidlovepianos.com

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Conrad Hoffsommer
Sent: Friday, March 06, 2009 10:56 AM
To: pianotech list
Subject: [pianotech] Yamaha C7 scale

Folks,

I'm midpoint in my new block and restring project (1977 and previously 
restrung w/4/0) and find a question arising re:sizes at bottom of tenor 
section.

I carefully miked the strings and found 20/19/18.
Cleaning the bridge, I found markings for 19/18.5/18.

I was planning to reuse the bass strings, so haven't measured them, but 
wonder if those of you who rescale as a matter of course would find a 
better scaling using the larger plain wire.

Just intuitively, I would think that the larger wire at that point would 
lower the inharmonicity and make the break even harder to smooth over. 
I'm thinking that I'll go back to the bridge markings vs:found sizes.

I've been wrong before.
-- 
Conrad Hoffsommer, RPT - Keyboard Technician
Luther College, 700 College Dr., Decorah, Iowa 52101-1045
1-(563)-387-1204 // Fax 1-(563)-387-1076