[pianotech] X-Ratcheting Counter Bearing Shim

[Ron Overs]

David and all,

We change the counterbearing arrangement 
similarly. I also regard it as important to have 
enough free string length segment on the 
tuning-pin side of the agraffe - 20 mm works out 
to be about the optimum (we have done tests 
in-house to establish this). Certainly, those 
pianos from makers who insist on running the 
counterbearing felt very close to the agraffe, 
tend not to speak quite as well as they otherwise 
would.

Good to see that nicely prepared plate, David.

Ron O.

>I've produced this method of counterbearing and tried inserting felt between
>the agraffes as well as not.  There doesn't seem to be any ringing if the
>felt is not inserted between the counterbearing bar and the agraffe.  I do
>insert felt on the tuning pin side even though that doesn't seem to produce
>much ringing either.  Lately, however, I tend to insert felt on both sides
>of the counterbearing bar more for looks than anything else.  It's pretty
>soft felt though and doesn't apply much if any real pressure on the strings.
>
>
>David Love
>www.davidlovepianos.com
>
>
>I like it, I have not had a lot of luck with protek on the understring felt.
>You do need to have contact with the felt though or you have some ringing?
>
>David Ilvedson, RPT
>Pacifica, CA  94044
>
>
>Attachment converted: Powerbk HD:P3210060.jpg (JPEG/«IC») (00CE4E46)


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OVERS PIANOS - SYDNEY
    Grand Piano Manufacturers
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