A tenor bridge conversion

[Concert Piano Service]

On 22-jan-2007, at 1:52, Ron Overs wrote:

> Hi all,
>
> I've just loaded a couple of images onto my webspace which show the  
> layout for a tenor bridge conversion of a Bechstein model C grand,  
> and an image of the new tenor bridge in place prior to stringing.
>
> Here is an image link taken at the layout planning stage;
>
> http://members.optusnet.com.au/ronovers/bech_c_tenor1.jpg
>
> Here is an image link, taken last Friday which shows the finished  
> tenor bridge in place, awaiting strings.
>
> http://members.optusnet.com.au/ronovers/bech_c_tenor2.jpg
>
> The original Bechstein C (circ 1953) was one of the most  
> outstanding examples of a poor scale I've ever measured in a mid  
> sized grand. The tension dropped down to around 18% at note E20  
> (the lowest note on the long bridge). To rectify this problem, a  
> new tenor bridge was designed from the first original trichord  
> plain note, E20, up to note D#31. The new lowest plain-strung  
> trichord is at a respectable tension of 36%. This will transform  
> the model C from one of the worst crosses in the business,  
> improving it to the point where it is about equivalent to the cross  
> of a model D Steinway (in terms of percentage of tension deviation  
> - the lower the deviation the better the tuning stability). Should  
> have it strung and playing in a couple of weeks.
>
> Ron O.
>



Hi Ron,
I have a question :

You cut off the treble bridge in the tail. Did you do that because  
that last part of that treble bridge is so close to the rim?
I worked on a brand new Bechstein C and I noticed that those first  
treble notes (nr 21 to appr. nr 30 sounded weird and were difficult  
to voice correctly, as usual).
I also wonder what kind of string thickness you use on that new  
bridge you built. Do they get thicker in size because they are shorter?


friendly greetings
from
André Oorebeek

Antoni van leeuwenhoekweg 15
1401 VW Bussum
the Netherlands

tel : 0031 35 6975840
tel : 0031 652388 008

where music is,
no harm can be


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