I replace the battery every 6-12 months, well before it should *need* replacement. The battery was at the same hotel room temperature for about four hours before calibration. It sat in my hotel room overnight before the exam. That is a good thought, though. I can easily test the battery with a volt-meter. JF On 7/1/07, Joe And Penny Goss <imatunr at srvinet.com> wrote: > > Hi, > Only thinkin > Battery how old? Temperature make a difference with the battery? > Best to use a new battery and recal before test. > Joe Goss RPT > Mother Goose Tools > imatunr at srvinet.com > www.mothergoosetools.com > > ----- Original Message ----- > *From:* John Formsma <formsma at gmail.com> > *To:* Pianotech List <pianotech at ptg.org> > *Sent:* Sunday, July 01, 2007 4:44 PM > *Subject:* Accufork & pitch reliability - was Acufork II you want to sell? > > I'm glad someone else brought this up. I think my AccuFork II also has > some pitch problems. > Measurement a couple weeks ago with a friend's RCT showed variation of 0.4cents, measured about five times in about couple minutes. I was taking the > RPT tuning exam at Kansas City, and the day before the exam calibrated the > AccuFork with the CTE's SAT III. > > The next day at the exam, the A4 I had tuned was 1.7 cents sharp. I had > checked with both B1 and F2, and was almost completely certain the beats > were the same as with the AccuFork. > > After the pitch part of the exam was over, I again checked the AccuFork > with the same SAT. It was about 0.4 - 0.6 cents sharp, judging from the > speed the lights were moving. We didn't take time to calibrate the AccuFork > then; only to move the slider to the place where it was actually A440 as > measured by the SAT. > > Now, I passed the tuning exam with very high scores, so it was verified > that I can hear beats quite well. The only thing I can think of is that the > AccuFork pitch drifts, or I just didn't set the A4 pin and string correctly > (not very likely). > > I don't have an ETD, so it's kind of hard to visually check the AccuFork. > Last night, I downloaded a guitar tuner program to my Palm. It showed about > the same pitch variation as the RCT. > > What device should I trust more? The Palm? Or the AccuFork? > > Is there somewhere on the internet that is a totally reliable place to get > smack-on A440.00 Hz? I'd like to figure out the problem, but don't really > know which device to begin with. I suppose I could download a trial version > of TuneLab, but how would I know it is more precise than the AccuFork? (Do > ETDs drift too?) > > Yes, yes, I know I'm talking about 0.4 cents at most, so it's not that big > of a deal. But I would like to have it within 0.1 cents, if not dead on. > > JF > > On 7/1/07, terryb <t46xd8jb at xplornet.com> wrote: > > > > Jim, > > > > I have an Accu-Fork II which I purchased several years ago, hoping to > > use it as a pitch source for the tuning exam. According to my RCT it was > > 0.43 cents flat. If it is left turned on for about one minute, it comes > > up to pitch. I'll sell it for $75.00 (battery not included). Shipping would > > be via mail. > > > > Terry Beckingham RPT > > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20070701/a7440e75/attachment-0001.html
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