Since you're considering the electronic alternatives, you might take a look at Jim Coleman's 12/2008 article in the PTG Journal. Basically: tune the piano's 3rd partial of A4 a few bps sharp of a quartz oscillator's 3rd partial. Get yourself a good quartz reference metronome with an A440 tuning setting. I bought my second Seiko SQ-50 on eBay for $10. (My teenager commandeered my first for band.) Both were within 0.2 cents of 440, tested against my NIST calibrated Tunelab. If you're in a hurry, maybe you'll pay $25-30. Three times more accurate. Cheap as a fork. No drift with temperature. Sits next to you on the bench, so no bopping your knee, or vibrating your teeth. Of course you've got to worry about having a fresh battery in the oscillator, but you can do that long beforehand. Jim On Wed, Jan 19, 2011 at 9:04 AM, James Sasso <jwsasso at gmail.com> wrote: > Hello Everyone; > I just bought a John Walker tuning fork from Schaff in preparation for my > tuning exam. All electronic instruments indicate this fork is 6-8 cents flat > at room temperature. I'd like to get some feedback as to options. My other > forks average average to within 2 cents of C5 and A4 but the A4 one is > aluminum. I was thinking of keeping and filing the John Walker fork, but > wouldn't 6-8 cents require an awful lot of filing and mutilation of the > fork? Another option would be to return the current one and ask Schaff to > send one closer to A440. A final option I've considered is to purchase a > Sanderson Accu-fork ($165 Pianotek). Any comments would be appreciated. > Thanks, > Jim > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20110119/dc71cf18/attachment.htm>
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