Phil.... The temperature of the fork has an influence on the frequency. Dick MT -----Original Message----- From: Kent Swafford <kswafford@earthlink.net> To: pianotech list <pianotech@ptg.org> Date: Wednesday, October 27, 1999 8:31 AM Subject: Re: A= 440 Fork modification? >Phil Bondi wrote: > >>I received an A=440 fork from a supply house we all know and love..and >>it's a fine instrument. >> >>It registers on the SATll at 440 and 1 cent. >> >>I do not intend to pull hairs here..rather..I would like to know >>if..during the Tuning Exam, there is a deduction for this? If I set A4 to >>this fork and nail it, the SAT will read that A4 is 1c above 440. >> >>I thought I understood that there is a compensation factor built into the >>test to accomodate such a phenomenon..is that correct? > >The tuning of A4 to A=440 constitutes an entire section of the PTG tuning >exam. When this is scored, the exam piano's A is measured relative to 440 >with no consideration for the accuracy of your pitch source. Your pitch >source is expected to be accurate. > >It is usually recommended that examinees tune their tuning fork (ahead of >time) to give themselves the best advantage. > >However, although there are no "compensation factors" in measuring your A >for the pitch section of the exam, there _are_ tolerances. If you miss >440 by up to 1.0 cent your pitch score will still be 100. A three cent >error on A4 yields the minimum passing pitch score of 80. > >Kent Swafford >
This PTG archive page provided courtesy of Moy Piano Service, LLC