[pianotech] Was high and outside now silent pitch lowering

[Joe Goss]

hi     Paul,
if you do the math you can make the sat do any thing. on most pianos I measure a2 if it is say 40 cents flat I change it to 20 and enter.
 tune the bass. measure the first tenor note. if it is a spinet I deduct 5 percent from the reading and enter. large pianos 25 percent.  recheck at 
Bb 4 or C 5 depending on how many notes are left before the break 25 percent re check at break and f6 c7 each time using 25 percent
I do check along the way and like to have the newly tunes note sharp of the octave and sort of in the ball park with the 4th and 5th..
around f6 I tune and leave the first and second string about 3 to 5 cts sharp and zero in the 3rd string. Check with ear and re tune if needed.
The process takes me about 45 minutes with the piano ready to tune 15 to 30 minutes or 1:30 Min
the above is done using heavy test blows.

Never have been successful with the blind over pull,it always results in me re tuning a squirrely piano several times to get it stable.
The above tuning is done with heavy test blows

Joe


























Joe Goss BSMusEd MMusEd RPT
imatunr at srvinet.com
www.mothergoosetools.com
  ----- Original Message ----- 
  From: paul bruesch 
  To: pianotech at ptg.org 
  Sent: Tuesday, October 30, 2012 7:35 AM
  Subject: Re: [pianotech] Was high and outside now silent pitch lowering


  Terry, 


  Which Sanderson do you use? With the SAT3 you only have the option of 25% or 33(?)%. 


  In most pianos, for smaller pitch raises I hardly overpull the bass at all. If it's a big PR (e.g. 40c-50c or more) even then 25% is too much in the bass.  I find that the 33% overpull in the top two octaves or so is oftentimes not enough. In order to compensate for these, I usually compensate on the "Msr" by going more flat (treble) or less flat (bass) before having it calculate the overpull. I re-"Msr" every C#, F, and A (M3's) 


  I strip mute, A0 - C8, unisons (center, previous note right, current note left, next note center, etc.) as I go... someday I'll get brave and try a single mute. Maybe. 


  I've always been tempted to investigate this, but does it really overpull that much at the very top? In other words, if I overpull C8 by 33%, what's to pull it flat, besides the other two C8 strings? Or are the other two strings enough to drag it back down? 


  Paul Bruesch
  Stillwater, MN


  On Tue, Oct 30, 2012 at 6:22 AM, Terry Farrell <mfarrel2 at tampabay.rr.com> wrote:

    I find it curious how folks find differing overpull percentages working for pitch raises. For me, I've settled on 16% in the bass, 28% in the tenor and 38% in the treble. Seems to work just about right on most any piano. I use the Sanderson method: A0 to C88, unisons as you go.

    Terry Farrell

    On Oct 30, 2012, at 12:44 AM, Cy Shuster wrote:

    > Good question! Answer is rarely.
    >
    > TuneLab has a safety limit for maximum overpull percentages. You tell it where the treble bridge starts, and you get one limit for the bass, another for the treble (slight differences between old Windows and new iOS/Android versions). I limit the bass to 10%, and treble to 25%.
    >
    > --Cy--
    >
    > Cy Shuster, RPT
    > Albuquerque, NM


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