Pitch Raise

[John Fortiner]

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Ah - but you must have missed the "smiley" (see below in the red print) that
I put at the end of the question regarding if Michael knew how much tension
would be on A-0 if tuned to 445 (as if it would ever have held that high a
pitch... :-)  Just a friendly raz...

John Fortiner

 

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From: DKnabe [mailto:dknabe@airmail.net] 
Sent: Thursday, May 12, 2005 5:31 AM
To: Pianotech
Subject: Re: Pitch Raise

 

John and List,

Surely Michael means:
     Tune the 16th partial of A0 to A-445;
     Tune the 8th partial of A1 to A-445; etc
     Tune the 4th partial of C#5 to the 5th partial of A-445
     etc, then
     Tune the 8th partial of G4 to the 7th partial of A-444
    etc. 

In other words, keep each string at approximately the correct pitch, but,
for 1st pass,
    overpull by 20 cents those notes tuned to A-445;  i.e. all A's, C#'s,
and F's
    overpull by 16 cents those notes tuned to A-444; i.e.  all G's, D#'s and
B's
    overpull by 12 cents those notes tune to A-443;  i.e.   all G#'s, C's
and E's
    overpull by  8 cents those notes tuned to A-442; i.e.   all F#'s, A#'s
and D's. 

When you finish the first pass, those notes tuned 20 cents sharp will have
fallen to being on-pitch. Since all the notes are now about right, fine tune
it normally on the second pass.

Regards,
Doug Knabe
Dallas
Michael Gamble wrote: 

Hello John and List

You asked:

 Do you have any idea how much tension would be on A-0 when tuned to
A-445??? :-) 

Non! But it can't be much above design tension can it!

Go for it - it works every time. The real "secret" is keeping the tension
equal right across the frame.

Talking about equal - anyone read "An Unequal Music" by Vikram Seth?

Regards

Michael G.(UK) 

----- Original Message ----- 

From: John Fortiner <mailto:JLFortiner@usadig.com>  

To: 'Michael <mailto:michael@gambles.fsnet.co.uk>  Gamble' ; 'tom
<mailto:tomtuner@comcast.net>  driscoll' ; pianotech@ptg.org 

Sent: Thursday, May 12, 2005 1:05 AM

Subject: RE: Pitch Raise

 

 

 


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From: Michael Gamble [mailto:michael@gambles.fsnet.co.uk] 
Sent: Wednesday, May 11, 2005 3:08 PM
To: tom driscoll; pianotech@ptg.org
Subject: Re: Pitch Raise

 

Hello Tom and List

I suppose it's not at all helpful to state the obvious - "it's in Archives"!
No? Well then this is the way to do it:

Have a cheapo ETD - you know the things - get it from a guitar shop. They
usually have A=439 to A=445 or so. With that tune all the A's to the A=445 -
all 8 of them. Do you have any idea how much tension would be on A-0 when
tuned to A-445??? :-)  Next tune the intermediate M3's i.e. all the C# and
the F's. Now quarter of the piano is done. 

Next recalibrate the ETD to A=444. Now tune all the G's to 444 pitch and
follow that with their intermediate M3's - i.e. all the D#'s and all the
B's. Now you're half-way!

Next recalibrate the ETD to A=443. Tune all the G#'s and then the
intermediate M3's. (three-quarters of the way!)

Last recalibrate the ETD to A=442. Tune all the F#'s and then the
intermediate M3's

And you're done! Sounds like a neat system that I'm going to have to try.

Now fine tune.

Note this... I ALWAYS DETUNE EACH STRING SLIGHTLY BEFORE PUTTING UP THE
TENSION. This breaks the bonding at the pressure bar or capo. Even use a
touch of de-oxidising fluid at those points before you start.

Regards from a dark Sussex Village

Michael G.(UK)

----- Original Message -----  

From: tom driscoll <mailto:tomtuner@comcast.net>  

To: Pianotech <mailto:pianotech@ptg.org>  

Sent: Wednesday, May 11, 2005 5:34 PM

Subject: Re: Pitch Raise

 

 

----- Original Message ----- 

From: Michael <mailto:michael@gambles.fsnet.co.uk>  Gamble 

To: pianotech@ptg.org 

Sent: Wednesday, May 11, 2005 9:54 AM

Subject: Pitch Raise

 

Hello List

. <SNIP>So I used my "Quadrant System" to bring it up to A=440 and fine tune
it in two hours. <SNIP>

    Michael G.(UK)

    

    Michael,

    Could you elaborate on the Quadrant system ?

    Thanks,

    Tom Driscoll RPTired today.


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