tuning pin torque

[Andrew and Rebeca Anderson]

David,
RH greatly affects tuning pin torque.  50-60 % may read OK while 8% 
will read inadequate.  You may have to re-measure again in the dry 
season.  That is way to wide a swing.  This piano needs a cover and a 
DC Piano-Life-Saver-System under it.  That swing will destroy 
pinblocks, soundboard, bridges (bridge-pinning) etc.  There are daily 
(temperature related) swings that also affect the tuning.  The DC 
system will control those and allow the piano to be in a 
concert-quality tuning for more of the time.  If they won't keep a 
cover on it, get them to use an Edwards string-cover.  The wool will 
(on its own) help to contain humidity swings and with the DC system 
protect the entire piano, extending the conditioned environment into 
the action cavity.  Without this added protection you are facing an 
impossibility.  I suspect the numbers you have provided will negate 
any warranty.

Good luck,
Andrew Anderson

At 10:03 AM 7/23/2006, you wrote:
>Patrick,
>Oh yes, I also plan on a fine tune procedure after I take all of the 
>torque measurements I fell necessary. I agree with you in that the 
>tuning process helps us become more intimate with the condition and 
>idiosyncrasies of all the components involved. Then, perhaps, I can 
>express any thought's I might have as to the pin tightness problem 
>to the builder.
>
>I don't have a digital type of instrument to measure humidity. We 
>usually have stable levels around 8 to 18 percent RH. Currently 
>we're in a monsoon weather pattern and levels are 50 to 60 percent. 
>It won't last long.
>
>I did send the pic's to files at ptg.org so hopefully they will be published.
>
>Thanks
>David Chadwick
>
>
>
>----- Original Message ----- From: "J Patrick Draine" <jpdraine at gmail.com>
>To: "Pianotech List" <pianotech at ptg.org>
>Sent: Sunday, July 23, 2006 7:12 AM
>Subject: Re: Re: tuning pin torque
>
>
>>On 7/23/06, David Chadwick <chadwick61 at cox.net> wrote:
>>>
>>>I have not done
>>>any previous tuning on the piano.
>>
>>Aside from the thorough measurement of pin torque that you're planning
>>on doing, I do hope you will be tuning the instrument as well. While
>>hard numbers are difficult to argue with, there's a great deal that
>>you can learn about the piano as you tune, even if the words one uses
>>to describe it may be compartatively subjective.
>>And yes, we're eager for the photos! If they're big send them to 
>>files at ptg.org.
>>Also, I think in the interest of fairness (or thoroughness) I think it
>>is important to measure the RH accurately, probably with a sling
>>psychlometer (sp?). And a good idea of what extremes the piano may go
>>through daily (searing stage lights, constant or intermittent intense
>>blasts of frigid AC, etc.).
>>Good luck and happy investigations,
>>Patrick Draine
>

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