Foundry Castings

[Don]

Hi Robin,

It was basically a 1/8 inch steel "sandwich". I serviced one for a number
of years and the hitch pins had begun to twist. I'm usually an A440 tuner
on any first visit--except fot the Currier Strataphonic. The sound board
was right up thru the pin block on these. It was a very innovative idea
probably with insufficient execution and testing. The first one I saw was
at a convention--and tuners were complaining they could not hear the
"beats". I could--and saw no difference in the relative loudness of them.


At 09:55 AM 8/28/02 -0700, you wrote:
>What is the Currier Strataphonic String Panel?  The name alone seems
>sufficiently impressive that it should have been continued in production.
>Regards, Robin Hufford
>
>Delwin D Fandrich wrote:
>
>> ----- Original Message -----
>> From: "David Ilvedson" <ilvey@sbcglobal.net>
>> To: <pianotech@ptg.org>
>> Sent: August 27, 2002 8:06 PM
>> Subject: Re: Foundry Castings
>>
>> > Sure, go on...but I don't see anything in your list that has a compelling
>> property superior to cast iron...do you?
>>
>> Yes. Steel for one--given proper tooling. As early as the 1970s steel was
>> becoming a viable competitor both in terms of performance and in cost. It
>> would require relatively high production and a fairly sophisticated factory
>> but it could be done. The advantages would be potentially lower cost (in
>> quantity), greater strength, lower weight and (probably) better acoustical
>> performance.
>>
>> There are several iron alloys other than gray iron that have much to
>> offer--higher strength at lower weight among them. The Currier Strataphonic
>> String Panel was a brilliant idea miserably executed. There are a
variety of
>> composites could be made to work quite well though their cost is still
>> somewhat high. I don't know enough about ceramics yet to be able to predict
>> their viability, but if you can build an engine block out of the stuff....
>>
>> Del
>
>
>

Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.

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