Soundboard rib question

Ric Brekne ricbrek@broadpark.no
Sun, 22 Jan 2006 00:27:22 +0100


Ron O.

First, thank you very kindly for putting down some words on this 
subject. Your post is greatly appreciated. Also, your reluctance to 
design change in this case  echos well  my own gut feelings.  It was 
made in the first three months of his production.  Still, and this is 
the eternal quandry in such matters... its in good enough shape to renew 
and make very fine music (again) but how far to go ?

My own feelings up to now have told me to carefully remove the 
soundboard, carefully remove the ribs and bridge and re-rib the existing 
panel. A new cap on the old bridge root.  I have felt that it would 
perhaps be ok to alter the rib scale and any modifications to the string 
scale that could be accomplished without relocating either bridge.  
These alterations could be acceptable if they assured a bit more clarity 
while maintaining the basic overall sound picture and if they increased 
the strength of the assembly for the long term.  Historical concerns 
relative to these modest changes can be addressed by documenting well 
enough the origional design.

I have two reasons for wanting to keep the old panel.  First is the 
visual and second is the origional soundboard decal. I am open to 
replacing the panel however as I can get a good << old >> look using 
dark french polish flake.  The decal stays however... one way or another. 

I can supply pictures of any particular part of this piano anyone 
wants.  The instrument is on its feet still and I am in the early stages 
of tear down...so an underside picture will be a bit limited... but doable.

Thanks again for the input.

Cheers
RicB



Ron Overs writes:

Yes, I believe you can have backscale lengths
which are too long for the middle and and higher
string sections. Sympathetic ringing can become
quite intrusive when the backs are too long. We
relocated the hitch pins for a shorter back scale
in the mid and high sections of a KG6 Kawai we
rebuilt a few years ago. The result was a
definite improvement.

In the case of Richard's early Blüthner, I would
be reluctant to change it design-wise. I'm not
often inclined towards preserving original older
designs, but the piano in question is a very
early Blüthner of which they are probably only a
few in existence. I think it is worth keeping
some of these significant earlier examples intact
so that we can keep an overview of the past 300
years of piano evolution.

Julius Blüthner turned 29 the year he built this
piano. The changes which he incorporated into his
instruments over the next thirty years was simply
staggering. I saw an early Blüthner at the
Griffith Ex Serviceman's Club in the early 70's.
This concert grand was 10' 4.75" long, with an 85
note scale and a patent action. But in most other
respects this instrument was a thoroughly
contemporary piano. Just last year we did some
minor repairs to a 1860 Blüthner which had
transit damage. Again, like Richard's example,
this piano was very primitive compare to the
above mentioned concert piano of 1883 (built in
his 49th year).

Unfortunately, the Blüthner concert piano was
lost in total-loss fire a few years after I saw
it.

I'd be interested in seeing an image of the
underside of the sound board when you can get one
Richard.

Back to work. Currently drawing the rim-bending bucks for the 280.

Ron O.

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