Accufork & pitch reliability - was Acufork II you want to sell?

[John Formsma]

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