Setting pitch with a fork for exam

Thomas Cole tcole@cruzio.com
Fri, 20 Aug 2004 20:15:29 -0700


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Adjusting the pitch of a tuning fork reminds me of tuning brass reeds. 
To sharpen, you scrape material off the free end (to reduce its mass and 
allow it to vibrate faster); to flatten, you scrape material off near 
the root (to reduce its stiffness and allow it to vibrate slower). You 
never shorten the length of the reed.

Similarly, I don't think it's necessary to shorten the tines to raise 
the pitch of a tuning fork, but one can remove material from the inside 
surface of each tine near the end, where the factory adjustment was 
made, and not spoil the plating on the ends, furthermore, if you have a 
plated fork.

Tom Cole

Joe And Penny Goss wrote:

>Hi Julia and others,
>Talk pianos heresy!
>To sharpen the pitch file equal amounts off the end of the tines. And to
>lower the pitch remove material from the crotch of the fork .
>Forks are usually built a tad on the flat side. An ETD used for tuning
>pianos can be used in the cal
>Joe Goss RPT
>Mother Goose Tools
>imatunr@srvinet.com
>www.mothergoosetools.com
>----- Original Message ----- 
>From: <Alpha88x@aol.com>
>To: <pianotech@ptg.org>
>Sent: Friday, August 20, 2004 9:35 PM
>Subject: Re: Setting pitch with a fork for exam
>
>
>  
>
>>In a message dated 8/20/2004 12:42:17 PM Eastern Daylight Time,
>>pianorye@yahoo.com writes:
>>
>>    
>>
>>>This may seem fairly generous, but it also assumes that the fork is
>>>calibrated. It's amazing how many people don't bother to calibrate their
>>>      
>>>
>forks
>  
>
>>>before the exam. I have seen people fail pitch who would have passed if
>>>      
>>>
>their fork
>  
>
>>>had been properly calibrated.
>>>
>>>
>>>
>>>
>>>      
>>>
>>Greetings,
>>
>>           How does one calibrate a their tuning fork?
>>
>>Julia Gottchall,
>>Reading, PA
>>
>>----------------------------------------------------
>>This message has been processed by Firetrust Benign.
>>    
>>
>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives
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>  
>

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