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Ringing Strings
#2877856 08/08/19 10:15 PM
Joined: Apr 2014
Posts: 262
Duaner Offline OP
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I wonder what your solution(s) is for "ringing strings". I guess it is mostly the wound strings but sometimes you'll hear the steel strings giving that extra ring out as they finish time when the dampers are up. I just tuned an older grand today and this was my experience with several notes. Granted much of the ringing was quieter after I got the tri and doubles to play in unison but it was still there and I felt I could have done better if I had some more ideas.

For instance some of the things I tried was: I used a thin felt "ribbon" weaving it up and around several strings back but in front of the hitch pins in some of the worst places. This helped some but it also muted the notes a little it seemed. I also backed off the obvious bass string offenders a full step and struck it quite hard with hammer (8-10 blows) thinking to shake some crud out of the coils.

The piano has original strings on it and I'm guessing 1950's or 60's new....I don't have the name of it for you but it is a mini-grand and I'm not even sure if I've given you enough info to make a judgement call. I'm persuming you have run into this a time or two and more so you get the picture I'm sure.

I'm quite sure that the ringing bass strings should probably be replaced to cure the problem completely but what do you think and how would you approach this situation if you walked in on it and the customer says ".....can you get rid of the ringing in the strings?".....as I will be back next year and the same (or worse) will still exist so it would be good to be armed with a little more ammo?

What else have you tried and had good or even some success with?


Last edited by Duaner; 08/08/19 10:18 PM.

Duane Graves


"Pushin 70...still haven fun I think..."
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Re: Ringing Strings
Duaner #2878044 08/09/19 11:56 AM
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Come on, Tech's.....what are your ideas.....what works for you.....someone must have some magic they can share to a fellow tech about "ringing strings"......


Duane Graves


"Pushin 70...still haven fun I think..."
Re: Ringing Strings
Duaner #2878053 08/09/19 12:23 PM
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Check the damper regulation.


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Re: Ringing Strings
Duaner #2878054 08/09/19 12:26 PM
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Not certain what you mean by ringing but a systematic approach to diagnosing string noise is good.
False beats are usually caused by loose bridge pins. You can put a little pressure on the bridge pin in the direction of the offset with a screwdriver to see if it has any impact.
Sometimes removing a bass string at the hitch pin and giving it a turn in the direction of the winding can help.
Not sure how to deal with longitudinal wave noise other than replace the string.
Be certain there are no leaking dampers or damper wires touching strings.
You can use your finger to press the string at all of the alaquots to see if that helps.
There can be burrs on the inside of agraffes.
The notching of the bridge can be ahead of or behind the bridge pin.
Probably several other causes.


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Re: Ringing Strings
Duaner #2878141 08/09/19 06:26 PM
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Duane,

Typically, if there is excessive ringing (virtually all pianos have some after ring) it usually is traceable to damper issues...either individuals not damping well, or somewhat hardened felt globally not damping as well as it used to.

Assuming that the dampers are not in fact slightly riding on the backs of the keys (keeping them from fully coming down on the strings), I would tend toward one of the above.

If the strings have been twisted, and the felt is used to the way they were before then they won't damp very well as they are riding on the ridges of the old winding profile. If you put your hand across the entire bass section after playing and they stop ringing then you know it has something to do with the damper action.

Best I can figure based on what you've said thus far.

Pwg


Peter W. Grey, RPT
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Re: Ringing Strings
Duaner #2878150 08/09/19 07:07 PM
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Thanks, guys, some real good information given here. Things I would have never thought of. I don't mind saying that "....I learned a lot!!"....I hope you are enjoying your weekend.


Duane Graves


"Pushin 70...still haven fun I think..."
Re: Ringing Strings
Duaner #2878168 08/09/19 08:54 PM
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One time I changed the bass dampers and a few more up into the tenor due to excessive after ringing. The result was that not only did it stop the ringing, but it dramatically changed the whole voice of the piano. Shockingly at first, but she got used to it.

Too much damping (too efficient) can choke the sound of a piano. Slight ring after can be used very effectively by the pianist. Too much, it becomes hard to deal with.

Pwg


Peter W. Grey, RPT
New Hampshire Seacoast
www.seacoastpianodoctor.com
pianodoctor57@gmail.com
https://www.youtube.com/watch?v=PK0T7_I_nV8
Re: Ringing Strings
Duaner #2880364 08/16/19 05:38 PM
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I found some of the strings below A4 on my upright actually had the section between the bridge and the hitch pin ring - the was no consistency - I stuffed felt between the offending strings Actually I have read that on some exclusie pianos this section is calculated at lengths that will ring ..


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