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String splicing question

  • 1.  String splicing question

    Registered Piano Technician
    Posted 8 days ago

    We all know, or should know, how to tie a tuners knot to splice a broken string. Also, that this splice/knot, at least in plain wire strings, must be made in a non-speaking part of the string. With wound bass strings, it's frequently possible to put that splice/knot in the speaking length when the break is at the agraffe. Many times it will work just fine. But, making that splice in the speaking length of a wound bass string near the agraffe can usually present us with a core wire length that is too short to make that splice/knot in the conventional manner. As I was wrestling with this exact situation today I remembered that I once read, or saw a video, of a way to make a splice like this without having to make the loop in the added on splice wire first, slipping it over the bass string and then making the loop on the bass string in order to slip the first piece back through. In other words, as I remember it, this was a method that allowed for making the bass string loop first and then adding the added on splice wire to that splice/knot afterwards, with the results being a traditional tuners knot. Did I dream this, or does such a method exist? And if it does, can someone point me to the instructions on how to accomplish it?

    Thanks --



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 2.  RE: String splicing question

    Registered Piano Technician
    Posted 8 days ago

    If the broken string doesn't have enough wire left to make the knot, and you want to tie into the speaking length, just unwrap some of the copper to get more to tie onto.  Just don't take off too much so the copper gets loose.  There has to be some of the copper over the swedged end or it might unravel.  You can make all the loops you need out of the piano, then install it.

    As far as making the loop in the piano, that would apply if you don't want to make the knot in the speaking length.  Then you'll have to have enough wire through the agraffe to make a loop in the piano near the tuning pin.  That's a trick, and I don't have that skill, which might be what you're getting at. 



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    Paul McCloud, RPT
    Accutone Piano Service
    www.AccutonePianoService.com
    pavadasa@gmail.com
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  • 3.  RE: String splicing question

    Registered Piano Technician
    Posted 8 days ago

    I think Maggie Jusiel has a pretty good handle on that. Maybe she will help you out.

    Peter Grey Piano Doctor 



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    Peter Grey
    Stratham NH
    (603) 686-2395
    pianodoctor57@gmail.com
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  • 4.  RE: String splicing question

    Registered Piano Technician
    Posted 8 days ago

    I just posted the following in my chapter forum as a monthly technical recap. Hopefully it works even if you weren't there

    Required tools for making spliceTools required for making splice:
    • Micrometer
    • Xuron Hard Wire & Memory Wire Cutter #2193F#2193F
    • 5WR Vise Grip Locking Pliers #902L3
    • Knipex 160mm Round Nose Pliers #22
    • Safety Glasses
    Vise Grip, left facing, labeled jawsWith the jaws of your vise grip facing up, label the left side 1, and the right side 2 as shown in the picture
    Vise grip right facing labeled
    With the jaws facing up, flip the vise grip horizontally and label the left side 1, and the right side 2 as shown in the photo. (Take careful note of the numbers in the photos)
    Micrometer measuring 0.043
    Measure the remaining wire to determine the correct size of the splice wire and dummy wire.  (Here, 0.043" indicates 19 gauge wire)
    Dummy wire for wrapping loop
    Cut a small piece of dummy wire that is the same gauge as the splice wire and the original wire.  This will be used as a disposable tool to aid in making tight coils, and along with the numbers on the vise grips, this will help with the correct orientation of the loops.
    Splice wire held in vise grip
    Hold the splice wire firmly in the jaws of the vise grip .  (The amount of wire held in the jaws will become the length of the wire extending from the knot.)  
    Lay the piece of dummy wire on the vise grip against the splice wire on the side labeled "1"
    Hold the dummy wire against the vise grip tightly with your thumb, and wind the splice wire around the dummy wire about 270 degrees.
    Tuck the tail of the loop underneath the long section of splice wire using round nose pliers.  This step will aid in assembly later.
    Make sure the piano wire is threaded through the agraffe or under the bearing point before continuing.
    Thread the splice wire with the loop onto the remaining section of piano wire.
    Take the remaining section of piano wire in your vise grip, and lay the dummy wire against the piano wire on the side labeled 2
    Holding the dummy wire against the vise grip tightly with your thumb, loop the piano wire around the dummy wire about 270 degrees
    Tuck the tail of the loop under the long section of wire.
    Thread the two wires together.
    Pull taut.
    Depending on how tightly the knot came together before adding tension from the tuning pin, cut the wire a little on the short side before making the tuning pin coil.  



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    Daniel DeBiasio
    Technical Education & Support
    ddebiasio@steinway.com
    718-267-3229
    Steinway & Sons
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  • 5.  RE: String splicing question

    Posted 7 days ago
    How absolutely elegant, Mr. DeBiasio





  • 6.  RE: String splicing question

    Posted 6 days ago

    Daniel, thanks for that clear instructive! I hadn't ever seen using the dummy string to make loops tight, but not too tight. Timely too with a bass string popping at the U on a 7' M&H today...

    Ron Koval



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    Ron Koval
    CHICAGO IL
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  • 7.  RE: String splicing question

    Registered Piano Technician
    Posted 7 days ago

    Geoff,

    I read your original post again and realized that the tutorial I posted was not what you were asking for.

    I think you might be thinking of the January 2019 issue of the Piano Technician's Journal.

    Also, Maggie Jusiel has an excellent video on YouTube about this topic called "Three Piano Wire Knots"



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    Daniel DeBiasio
    Technical Education & Support
    ddebiasio@steinway.com
    718-267-3229
    Steinway & Sons
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  • 8.  RE: String splicing question

    Registered Piano Technician
    Posted 7 days ago

    I want to share a link where I demonstrate a knot that my friend Andy affectionately called the Sutton's Bend. I can't take credit for this splicing technique, but it improves the ability to perform a splice in the case mentioned above.

    In French with English subtitles: https://youtu.be/_S8sn_UKqY8?si=FxAIt45vf9RJrKAS

    Dubbed in English with ai (Funny accent ): https://youtu.be/Yi3G_mpxwLU


    Allan Sutton, m.mus. RPT, TEC
    www.pianotechniquemontreal.com







  • 9.  RE: String splicing question

    Registered Piano Technician
    Posted 7 days ago

    Alan,

    I remember being exposed to this many years ago but I failed to pursue practicing it and forgot the details. I'm definitely going to practice and master it now with your tutorial. It is particularly helpful in tight spaces. 

    Thanks!

    Geoff,

    In your specific case (if using the traditional square knot as demonstrated), what is needed is to make the loop on the new wire large enough such that you can pass it down AROUND/OVER the windings before inserting the end into the opposing loop. Then just tighten it up as needed. 

    I learned string splicing from Yat Lam Hong in an article he wrote in the journal back in the 70's (I think). He covered all of this and more. Excellent article.

    Peter Grey Piano Doctor 



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    Peter Grey
    Stratham NH
    (603) 686-2395
    pianodoctor57@gmail.com
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  • 10.  RE: String splicing question

    Registered Piano Technician
    Posted 7 days ago

    Interesting knot. If I had a little more wire to work with it might have worked. I think both videos feature the same voice. He's just speaking French in one and English, with a French accent in the other. Thanks. 



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 11.  RE: String splicing question

    Registered Piano Technician
    Posted 6 days ago

    If one chooses to make a knot in the speaking length, some of the winding can be removed. There is usually enough flattened core wire to take some winding off while still preventing buzzing. I found that a very short length  of remaining core allows for a good splice.


    Allan Sutton, m.mus. RPT, TEC
    www.pianotechniquemontreal.com







  • 12.  RE: String splicing question

    Registered Piano Technician
    Posted 7 days ago

    Using that search term, "Three Piano Wire Knots", on YouTube brought up a lot of really good and interesting videos on knots. Piano knots. Maggie's was right at the top. Here is a direct link to that video. Yes, the knot I was looking for is in there. Thanks. 

    https://www.youtube.com/watch?v=W54lBby_mU0 



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 13.  RE: String splicing question

    Registered Piano Technician
    Posted 6 days ago

    Daniel --

    When I first saw your original post I just glanced at it as a description of how I already splice wires. But after reading Ron Koval's response I looked at it more closely. I agree, the use of the dummy wire for making the loop is a great idea that I had never heard of before. My only addition to the instructions you have provided would be to select the next thicker gauge wire for the splice wire. I was taught this as a way to reduce the possibility of the splice wire stretching and causing some minor instability after bringing the wire back up to tension. You are correct that your response did not address the question I had posted but it was, nevertheless, a valuable addition on the subject of wire splicing. Thanks --



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 14.  RE: String splicing question

    Registered Piano Technician
    Posted 6 days ago

    Hi Geoff et al! 

    Sorry I didn't see this sooner. Glad you found my video useful! Yes, the hybrid knot is in there, but I just fell in love with Allan Sutton's knot. I expect I'll be using that in the future! I was going to share that I have done a traditional knot with a small amount of wire left near a winding by making the loop on the new piece of wire large enough to pass over the coil. This can work quite well when the coil isn't too think. I have pictures, but only of the end results. I expected I'd be trying this eventually on a thick coil, but I'm thinking Allan's knot would be better because it would avoid the extra large loop. 

    Daniel - Those are fantastic photos! 

    Allan - When I started playing your video, Tim (hubby) was in the room and started translating for me automatically. Haha! ;-) 

    Maggie



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    Maggie Jusiel, RPT
    Athens, WV
    (304)952-8615
    mags@timandmaggie.net
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  • 15.  RE: String splicing question

    Registered Piano Technician
    Posted 5 days ago

    Maggie,

    I'm glad you like my knot! It's actually a traditional knot, just threaded differently. I still need to determine the right proportions between the wire thickness, the loop diameter, and the tail length.

    The challenge with larger winding is exactly why I started using this method-it keeps things more compact and secure. I'd love to see your pictures, even if they're just the end results!

    ...and... Bonjour Tim, au plaisir de se rencontrer un jour....au Canada ...��


    Allan Sutton, m.mus. RPT, TEC
    www.pianotechniquemontreal.com





  • 16.  RE: String splicing question

    Registered Piano Technician
    Posted 5 days ago

    Allan - Hope I'm not hijacking Geoff's thread. He may be interested in these pictures. One is a few knots where I made the loop on the new string segment large enough to go over the winding. You can tell which one I didn't bend inward far enough because it caught the winding. Boy was I annoyed with myself for that one. The other picture is of your knot and one of mine, which I would have called a standard knot. They are different in that my tails are against each other on the inside while yours are going through the outer part of the loops. I'm definitely going to be trying that one. I already like it better. ;-) 

    Tim sez: Le plaisir sera le notre. Peut être à Des Moines bien que nous avons toujours voulu venir au Canada.



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    Maggie Jusiel, RPT
    Athens, WV
    (304)952-8615
    mags@timandmaggie.net
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  • 17.  RE: String splicing question

    Registered Piano Technician
    Posted 5 days ago

    Maggie --

    You're not hijacking my thread. You're staying on subject and providing interesting and useful information. I'm grateful that my post garnered such interest. (BTW, you hinted that your previous post had pictures but... um... where are they?) Now, if your posts somehow changed the topic to something else, that might possibly be hijacking but it would really be an indication of someone not knowing how list servers and forums actually work. 



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    Geoff Sykes, RPT
    Los Angeles CA
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