[pianotech] X-Ratcheting Counter Bearing Shim

David Ilvedson ilvey at sbcglobal.net
Wed Apr 14 17:19:42 MDT 2010


It looks good too!

David Ilvedson
Pacifica, CA

On Apr 14, 2010, at 2:11 PM, Jon Page <jonpage at comcast.net> wrote:

Well, it worked. Installing the half-rounds pulled whatever pitted wire
away from the agraffe and it tunes smoothly. Another factor is that it
reduced the drag of all the wire contacting the counter bearing felt.

There is still some wire contacting the felt, enough to mute the segment.

It seems this is a viable work-around for these untunable, ratcheting notes
making them tunable.

I was able to install most of them with the off set screw driver but the
lowest six unison needed to have most of the tension dropped in order
to get the insert under the wire in the tight space between the pin and felt.
-- 

Regards,

Jon Page
<counter bearing shim6.jpg>
<counter bearing shim7.jpg>



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