[pianotech] Raising rates in recession

[David Love]

Depends on the machine.  A VT calculates it automatically by measuring each
note that you are tuning and if in pitch raise mode gives you a target based
on your programming.  The SAT you have to take periodic measurements as you
are going, say every 5th or octave or so.  The RCT calculates the average
based on the last five notes tuned (trailing average).  Whichever way the
ETD's do a pretty good job of figuring out the required overpull and giving
you a target.  The standard overpull settings will vary depending on which
part of the piano you are talking about.  The 38% overpull is a standard of
the VT for the treble but I think it's a bit too much and you can customize
it.  The SAT III has as 25% setting and a 32% (or something like that) and
you can choose which one to use depending on which part of the piano and
what type of piano (they vary).  I'm not sure what the RCT settings are.  

David Love
www.davidlovepianos.com


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ron Nossaman
Sent: Friday, July 02, 2010 9:34 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Raising rates in recession

Terry Farrell wrote:
> Correct on the overpull. But I find that medium and larger sized pianos 
> require somewhere in the range of 38% overpull. This guy said the piano 
> was a semitone flat. When you pull up the pitch starting from A0, that 
> will cause the strings toward the treble to drop in pitch. As the pitch 
> raise proceeds through the tenor to the treble, I would expect that the 
> next note in the treble would be 130, 140 or so cents flat, and 
> requiring something approximating a 50 or 60 cent overpull. Every piano 
> is different, of course.

I'm told over and over that ETDs calculate this stuff 
automatically, so the poor backward aural tuner doesn't have 
to guess on pitch raises. Accurate one pass pitch raises is 
one of the primary leverage points for ETD use, isn't it?

Ron N