scaling problem

[David Love]

Is it possible, then, that you simply mixed up the order of a string when
you taped them together?  Either way, I would probably lay the plate back in
the piano and go ahead and measure the speaking lengths.  To make the
wrapped strings accurately, you will have to measure them anyway for the
string maker in the manner I described previously.  Some older Knabes have
weird scales in terms of the tensions.  I'm doing an old grand now that
looks like it will want a new bridge.  Even though you are not going that
far, if you are recapping the bridges, you might be able to make some small
changes to the layout to improve things.  Short of that, you will at least
be able to get the best plain wire pattern for what you have.  It's not that
much trouble and/or expense and I think it would be worth it.  

The two people I know of who do rescaling for hire are Ron Nossaman and Del
Fandrich.  They are both on the list.  

David Love
davidlovepianos at comcast.net 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of ed miller
Sent: Tuesday, April 18, 2006 4:08 AM
To: pianotech at ptg.org
Subject: RE: scaling problem

Thanks David.

Here's the situation. At the time I destrung the piano I did not have a 
trustworthy mircometer, so I took out each unison, taped them together and 
labeled the note number. Then I took out the plate to make soundboard and 
bridge repairs, so I can't measure string lengths at this time.

I 'miked' the unsions yesterday with my new micrometer, and that's when I 
found the problem.

Maybe I'll take the speaking length measurements when the plate is back in 
and have it rescaled......any other options? Is it possible I can find a 
scaling that has already been done for this piano? It is a 1908 52" Knabe 
Upright

Ed

>From: "David Love" <davidlovepianos at comcast.net>
>Reply-To: Pianotech List <pianotech at ptg.org>
>To: "'Pianotech List'" <pianotech at ptg.org>
>Subject: RE: scaling problem
>Date: Mon, 17 Apr 2006 20:27:40 -0700
>
>If it's already destrung and you can't take measurements, how do you know
>that there are two different size strings on one unison?  All strings in a
>unison need to be the same size.  I'm not sure exactly what the situation 
>is
>but you should make the correction in one direction or the other.  Try and
>determine if the pervious stringer just put on the wrong size by examining
>the number of hitches per string grouping in that area.  You can also add a
>hitch pin for a single string if necessary.
>
>Should you decide to rescale, it's not a bad idea, there are several people
>around who do it and it's not prohibitive.  All you need to do is measure
>the speaking lengths and give the wire sizes you have for the plain wire
>strings.  The method for measuring wrapped string lengths is usually to 
>take
>a measurement from the hitch pin to the bridge pin on the speaking side and
>then the hitch pin to the agraffe or termination on the tuning pin side.
>The speaking length can then be calculated by the difference and any good
>scaler can calculate a wrapped string chart and scale from that data.  If 
>it
>is truly a learning experience piano, you will gain some knowledge by 
>having
>someone do the rescaling for you and you will also be able to solve the
>current dilemma in an appropriate manner.
>
>David Love
>davidlovepianos at comcast.net
>
>-----Original Message-----
>From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
>Behalf
>Of ed miller
>Sent: Monday, April 17, 2006 7:35 PM
>To: pianotech at ptg.org
>Subject: scaling problem
>
>I am restringing an entire piano for the first time.
>
>I have encountered a unison with 2 different sized wires in it (sizes 15.5
>and 16). I am sure that this is the case (ie, this is not due to an
>incorrect mesaurement).
>
>My question is....what are my options for restringing?
>
>The piano I am working on is my own project for learning purposes. I am
>trying to spend as little money as possible (so I do not want to pay for it
>to be rescaled... besides, isn't it too late since I can't take approriate
>measurements with it already de-strung?).
>
>Should I restring it the way it was? Should I add some single strings to
>make all unsions contain the same wire size within themslves? What
>else.....?
>
>Thanks in advance.
>Ed
>
>
>
>
>