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Hi Mike,<br>
I've finally found a good use for my Jaras key leveller, install two long
pillars in place of the present ones, get a rubber hammer and cut about
half the head off on a band saw, bore two holes to fit the pillars, notch
the tapered face with a 1/2" tounge that is 1/2" deep. I
inserted two brass sleeves inside the holes so that it slides nicely.
An 8" drop gives a reasonable <i>ff </i> . You need to play
the note three or four times to remove static friction to obtain
reproduability. I am using this device on a research project into the non
linear aspects of Youngs Modulus and elasticity of hammer shoulders.
Results are with in 10% reproducability with most of the harmonic series
that I am looking at with the spectrum analyser on a RCT. No
questions please, as I am not sure of what I am finding at this
time.<br>
However I have convinced a Prof of Non linear materials to help me
with the project.<br>
Questions on the gizmo welcome.<br>
Regards Roger<br>
<br>
<br>
<br>
<br>
<br>
At 02:45 PM 30/09/98 +0000, you wrote:<br>
>Hi Bob, <br>
> I will do it but must first create a way to
play the notes in a<br>
>uniform manner. I don't have a tuning stability testing tool
but do<br>
>have good pianos to do the test on. I will have to think about
making a<br>
>harmless device to give consistent playing force so the results will
be<br>
>useful. Suggestions anyone? I'm gone the rest of the week
but will be<br>
>thinking.<br>
>-Mike Jorgensen<br>
><br>
>fndango@azstarnet.com wrote:<br>
>> <br>
>> To Mike J,<br>
>> <br>
>> Yes, please use the pianalyzer to compare the partial strengths
with and<br>
>> without the front duplex muted. I think several of us would
be<br>
>> interested.<br>
>> <br>
>> Bob Anderson<br>
>> Tucson, AZ<br>
> <br>
<div>Roger Jolly</div>
<div>Baldwin Yamaha Piano Centre</div>
<div>Saskatoon and Regina</div>
<div>Saskatchewan, Canada.</div>
<div>306-665-0213</div>
Fax 652-0505
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