[pianotech] different Inharmonicity in Yamaha plain wire

[Don Mannino]

I do not know what wire Yamaha uses.  All three wire companies I am familiar
with (Nippon, Mapes, and Roslau) make multiple grades of piano wire.
Generally the lower cost wires are stiffer, not drawn as carefully and
consistently, and not polished as nicely.  The tensile strength is not
substantially different, but the other properties might be different.
Someone who knows wire manufacturing better than I will have to answer about
that.

Don Mannino

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Patrick Draine
Sent: Friday, June 25, 2010 4:55 PM
To: mvanloon at pianoman.nl; pianotech at ptg.org
Subject: Re: [pianotech] different Inharmonicity in Yamaha plain wire

Don Mannino may be able to give you a general answer to this question.
This topic came up one of classes several years ago, and he mentioned
that there were several grades of piano wire in Asian and Europe, the
premium grades for the very best instruments in their region, the
lowest grade for some lower cost models. And possibly a medium grade
in there as well.
Patrick

On Friday, June 25, 2010, Michiel van Loon <mvanloon at pianoman.nl> wrote:
> Hello Everyone,
> I have been off this list for a long time, so I do not know of this
subject has been discussed.
>
> My question is:
> Is there a difference between Yamaha plain wire and Röslau wire?
> And if so what is the difference in numbers: Inharmonicity and E modulus
etc
> And what are the consequences?
>
> --
> Vriendelijke groeten,
> Michiel van Loon
> Meppel
> 0522 255160
> 06 55150644
>
> KvK nummer 04040386
>
>