[pianotech] GH-1s, etc.

[paul bruesch]

The attached graphics make the archives just fine, thank you...
https://www.moypiano.com/ptg/pianotech.php/attachments/20121214/4aa3a09e/attachment-0003.png
https://www.moypiano.com/ptg/pianotech.php/attachments/20121214/4aa3a09e/attachment-0004.png
https://www.moypiano.com/ptg/pianotech.php/attachments/20121214/4aa3a09e/attachment-0005.png

Clear evidence that 20(?SWAG)-yr-old listserve software can do it. Why
can't HL?

Paul Bruesch
Stillwater, MN

On Fri, Dec 14, 2012 at 2:07 PM, David Love <davidlovepianos at comcast.net>wrote:

> Yes, Dale is correct.  Different string makers have different solutions
> and ideas.  ****
>
> ** **
>
> Just to pursue this a bit further, here’s a graphic illustration of what
> different string scalers might come up with.  My general procedure on all
> pianos is to calculate out the string scale and at least look at it.  I
> have my own spread sheet for this.  On this particular Steinway B it was
> clear that the upper treble dropped off considerably owing to a relatively
> short speaking length at note 88.  On both of these a recapped bridge
> allowed me to layout the top treble section a bit differently with a
> speaking length at 88 of 52 rather than 48 mm that was there on the
> original and a log scale in that section.   I feel quite comfortable in the
> plain wire section however in the bass I defer to others with more
> experience than I have yet you can see there are differences and one does
> have to make an esthetic judgment at some point and go with what sounds
> best no matter how it may look on paper.****
>
> ** **
>
> The treatment at the bottom of the tenor bridge varied with a few minor
> tweaks of wire, no changes to wrapped strings there.    ****
>
> ** **
>
> The original scaling (#1) had a very pronounced tonal jump at note 20.
> You can see that in the graph.  The tonal transition is at best a problem
> there but this original (early 20th century) Steinway scaling enhanced
> that difference even more.  The more recent scaling that Steinway uses is
> slightly different with lower tension at note 20, lower impedance and not
> quite such a loud bark.  ****
>
> ** **
>
> The bass scaling was two different proposals by different people (#2 and
> #3).  I put #3 on originally and then eventually took it off because I
> didn’t like it settling for #2.  ****
>
> ** **
>
> Just to give an example of how people can view this differently and come
> up with different solutions.  ****
>
> ** **
>
> The line at the bottom that is unlabeled is the BP%, btw.  You’ll need to
> be in html to view this and, of course, it won’t reach the archives.  ****
>
> ** **
>
> ** **
>
> ** **
>
> ** **
>
> **1.       ** Original Steinway B****
>
> ** **
>
> ** **
>
> ****
>
> ** **
>
> ** **
>
> ** **
>
> **2.       ** Steinway B with modified treble layout and bass rescaling***
> *
>
> ** **
>
> ** **
>
> ****
>
> ** **
>
> ** **
>
> **3.       ** Steinway B with modifed treble layout and different bass
> scaling****
>
> ** **
>
> ****
>
> ** **
>
> ** **
>
> David Love****
>
> www.davidlovepianos.com****
>
> ** **
>
> *From:* pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] *On
> Behalf Of *Dale Erwin
> *Sent:* Friday, December 14, 2012 7:25 AM
> *To:* pianotech at ptg.org
> *Subject:* Re: [pianotech] GH-1s, etc.****
>
> ** **
>
> By the way for what its worth, String makers will tell you certain thing
> based on there on bias and method of calculating in tensions. IE. For a
> while I had a well known string maker make tri-chords for 3 wrapped unison
> for the Stwy B break. (on the original bridge) It was an improvement but I
> wanted bi-chords but was told that it couldn't be done.  ****
>
>   Well turns out I didn't like the tri-chords so much. SO I asked another
> maker if they could make the bi-chord and they said sure no problem. SO as
> it turns out, for my ear, its a good remedy when not adding a transition
> bridge,  and less invasive to the original design than lopping off the
> bridge. Some folks like the original thing.****
>
>   I only add 3unisons of bichord and its a much better sounding break than
> original....and more musical than the tri-chords. The tri-chords developed
> false beats after a while and some broke. ughh how I hate that.****
>
> *Dale Erwin R.P.T.
> **Erwin's Piano Restoration Inc.**
> **Mason & Hamlin/Steinway/U.S. pianos
> **www.Erwinspiano.com**
> **Phone: 209-577-8397**
> *
>
>   ****
>
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