Oops?

[Warren Fisher]

---------------------- multipart/alternative attachment
Terry,

Who was this addressed to?

Warren

Farrell wrote:

> It is hard to believe you end up with a piano at targeted pitch. Your
> description appears to defy laws of physics. Consider the top two of
> four sections on the grand. If the whole piano was 100 cents flat,
> starting at A0, by the time you get to the upper treble those notes
> will be 120 or more cents flat. Raise them to targeted pitch, and they
> will fall a good 33%, or 40 cents by the time you finish your first
> pass. Treble now 40 cents flat. Start second pass targeting standard
> pitch, no overpull. Treble will be at least another 10 cents flat by
> the time you get there, so it will be 50 cents flat. Raise treble to
> standard pitch, and they will fall a good 33%, or 17 cents or so. The
> treble is now 17 cents flat after the second pitch-raise pass. Now you
> start your tuning pass with the treble 17 cents flat? Tenor will
> likely be in the 10-cent flat area. If, on the tuning and final pass
> you do not add any overpull, you will still end up at least 3 cents
> flat in tenor and somewhere between 5 and 10 cents flat in treble. I
> have yet to see a piano that varies significantly from the above
> description. Am I missing something? "......am I concerned about the
> quality or stability of the tuning?" Hmmmmm. Why do you not use any
> overpull to get the piano to pitch? Terry Farrell ----- Original
> Message -----
>
>      From: David Ilvedson
>      To: pianotech
>      Sent: Tuesday, November 06, 2001 1:23 AM
>      Subject: Re: Oops?
>       I am in the minority, but I don't raise above pitch at
>      all...If -100 cents, I take a my FAC readings with those
>      notes at correct pitch then bring each string up to a
>      correct pitch as per SAT from A0 to C8...if the tenor isn't
>      as flat as the rest of the piano it doesn't get raised any
>      higher than any other part of the piano.  So when I go
>      through it a second time it is about 10 to 15 cents flat (I
>      don't really care where...the piano decides that but it
>      isn't anywhere near 30 cents flat!) and I go through it
>      again to pitch.  The bass is now reasonably stable and a
>      quick 3rd time through the tenor/treble and I'm done with
>      the initial tuning...see ya in 3 to 6 months...am I
>      concerned about the quality or stability of the tuning?  I
>      don't think so...I didn't let it go for 15 years...it's not
>      my problem...I don't use a temp strip, just mutes and tuning
>      unisons as I go... David I. *********** REPLY SEPARATOR
>      ***********
>
>      On 11/5/01 at 7:35 PM Billbrpt@AOL.COM wrote:
>
>           In a message dated 11/5/01 6:16:31 PM Central
>           Standard Time, davidlovepianos@earthlink.net
>           (David Love) writes:
>
>
>          > Also, so that those who are not familiar with
>          > your style of tuning are not mislead, the
>          > standard pitch raise function should get the
>          > treble sharp enough if you measure/reset
>          > frequently on the way up and if you are using
>          > standard stretching.  I recall that you
>          > mentioned that in your tempered octaves tuning
>          > you are +75 cents by the time you get to C8.
>          > Those tuning with normal stretch are more likely
>          > to reach only +40.  For your system that would
>          > require additional stretch going up.  For
>          > others, they would end up considerably sharp of
>          > the target and have to do a lowering before a
>          > fine tuning.
>
>           Yes, but bear in mind that most of the time I use
>           a more conventional amount of stretch.  The triple
>           octave/double octave and fifth comparison is only
>           for when I wan the absolute maximum and
>           justifiable amount.
>
>           Once I get into the last part of the 7th octave,
>           all bets are off.  But let's take a piano that is
>           1/2 step flat in the midrange.  That's 100%.  Very
>           often, such a piano is not evenly low in pitch.
>           The high treble may easily be 150% flat.  Now add
>           30 cents for the high treble for the usual amount
>           of stretch.  We're up to 180% now, which
>           theoretically would take +60 cents overpull.
>           Yipes!
>
>           Maybe on a new or newly strung piano but even
>           then, I'd prefer to work my way up.  The danger of
>           breaking a string or splitting the bridge on the
>           poor old Betsy Ross is simply too great.  Add to
>           that the kind of test blows needed to settle such
>           a change and you'd be bustin' those elbows or
>           breaking the keys themselves at the balance rail.
>
>           It all adds up to a claim that I would really like
>           to see substantiated:  a 100% pitch raise in 2
>           passes that comes out "dead on".  I'm not from
>           Missouri but *show me* anyway.
>
>           Bill Bremmer RPT
>           Madison, Wisconsin
>
--
Warren Fisher RPT
fish@Communique.net
1422 Briarwood Dr.
Slidell, LA 70458-3102


---------------------- multipart/alternative attachment
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/c3/64/16/cf/attachment.htm

---------------------- multipart/alternative attachment--