I’m sorry–did I miss some additional numbers or an attachment somewhere? You can’t tell much of anything about a stringing scale without string lengths. Wire sizes by themselves are meaningless.
I have a Sohmer 6’ 3” scale in my computer archives with a tension of 228 lbf at note A-37 and a tension of 121 lbf at note A-25. Try voicing that out smoothly. It has a tension of 215 lbf at E-44 and 180 lbf at F-45.
Another Sohmer scale I have handy is from an 8’ 4” grand. This one has a tension of 296 lbf at note C-64 – the percentage of breaking is about 83%. This piano also has a tension of 334 lbf at note D-30 (and that’s still a tri-chord steel string). The total scale tension on this piano was about 62,850 lbf. I’m still amazed that the frame hadn’t broken wide open on that sucker!
There is nothing you can do to “rescale” these pianos and make them into anything decent. They need (and got) new bridges.
ddf
Delwin D Fandrich
Piano Design & Fabrication
620 South Tower Avenue
Centralia, Washington 98531 USA
del at fandrichpiano.com
ddfandrich at gmail.com
Phone 360.736.7563
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of tnrwim at aol.com
Sent: Thursday, January 06, 2011 10:15 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Sohmer scale
Very poor scaling. Some Sohmer scales are among some of the worst I’ve ever evaluated—and I’ve been through hundreds, if not thousands of them.
ddf
Del
Looking at the scale Rick just posted, without doing a lot of evaluation, how would you improve the scale?
Wim
-----Original Message-----
From: Delwin D Fandrich <del at fandrichpiano.com>
To: pianotech <pianotech at ptg.org>
Sent: Thu, Jan 6, 2011 5:11 am
Subject: Re: [pianotech] Sohmer scale
Very poor scaling. Some Sohmer scales are among some of the worst I’ve ever evaluated—and I’ve been through hundreds, if not thousands of them.
ddf
Delwin D Fandrich
Piano Design & Fabrication
620 South Tower Avenue
Centralia, Washington 98531 USA
<mailto:del at fandrichpiano.com> del at fandrichpiano.com
<mailto:ddfandrich at gmail.com> ddfandrich at gmail.com
Phone 360.736.7563
From: <mailto:pianotech-bounces at ptg.org> pianotech-bounces at ptg.org [ <mailto:pianotech-bounces at ptg.org?> mailto:pianotech-bounces at ptg.org] On Behalf Of Carlos Ralon
Sent: Thursday, January 06, 2011 6:32 AM
To: <mailto:pianotech at ptg.org> pianotech at ptg.org
Subject: Re: [pianotech] Sohmer scale
Wm,
To my knowledge..., Sohmer did not use any half sizes in their scales. I just un-strung an old 5'7" Sohmer and it hod no half sizes. Anyone know why?
Carlos Ralon, RPT
----- Original Message -----
From: <mailto:tnrwim at aol.com> tnrwim at aol.com
To: <mailto:pianotech at ptg.org> pianotech at ptg.org
Sent: Wednesday, January 05, 2011 11:51 PM
Subject: Re: [pianotech] Sohmer scale
Why would anyone want to use the original scaling on any piano?
On some pianos, it might make a difference. But not on all pianos. Sohmer, for one, did a pretty good job. But besides that, this is a situation where I, (and the customer), don't want to spend the time and/or money to figure out a new scale. It's just not worth the effort to try to improve on the piano.
Wim
-----Original Message-----
From: Terry Farrell < <mailto:mfarrel2 at tampabay.rr.com> mfarrel2 at tampabay.rr.com>
To: pianotech < <mailto:pianotech at ptg.org> pianotech at ptg.org>
Sent: Wed, Jan 5, 2011 2:41 pm
Subject: Re: [pianotech] Sohmer scale
I always start scratching my head when I see treads like this. Why would anyone want to use the original scaling on any piano? I mean I think this thread is separate from the museum restoration thread......
Terry Farrell
On Jan 5, 2011, at 1:08 PM, <mailto:tnrwim at aol.com> tnrwim at aol.com wrote:
Rick
I got rid of my scaling books when I moved to Hawaii, thinking I would never restring a piano again. Could I ask you to send me the numbers, please, privately if you wish.
Thanks
Wim
-----Original Message-----
From: RWyatt8547 < <mailto:RWyatt8547 at aol.com> RWyatt8547 at aol.com>
To: pianotech < <mailto:pianotech at ptg.org> pianotech at ptg.org>
Sent: Wed, Jan 5, 2011 6:42 am
Subject: Re: [pianotech] Sohmer scale
Wim
look on page 397 in Travis guide to restringing , I believe that is the scale you need
Rick Wyatt
Dallas chapter
In a message dated 1/4/2011 4:42:06 P.M. Central Standard Time, <mailto:tnrwim at aol.com> tnrwim at aol.com writes:
Does anyone have the scale for Sohmer grand model 57. Customer removed all the stripngs, and wrote down the scale that was on the plate, but didn't write down how many notes per size. I've more or less figured out what I need, but I've run out of hitch pins in the middle section.
Wim
Sent from my HTC PURE™, a Windows® phone from AT&T=
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