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Pointers on Sound Board Repair #2894059 09/25/19 10:40 AM
Joined: Apr 2014
Posts: 221
Duaner Offline OP
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I'm wondering what other techs have experienced in the process of repairing Sound Boards that are loosed away from ribs, etc. and are now causing vibration noise.

Maybe there is a crack(s); maybe a variety of scenarios could be written here and presented as possibilities but generally it is something or other to do with causing the Sound Board to make weird buzzing or vibrating sounds or whatever you want to call it.

Question: What have you done to help or hopefully to eliminate this Sound Board buzz?....also, is there a special way you have found that works for you in locating the "spot"? What procedure do you appropriate to fix the situation once it is found? Do you drill the rib and apply screws that bring the sound board back to the rib?

I have been asked to check on a Sound Board in an old vertical and so throwing this question out there for your thoughts.

Last edited by Duaner; 09/25/19 10:42 AM.

Duane Graves


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Re: Pointers on Sound Board Repair [Re: Duaner] #2894073 09/25/19 11:33 AM
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BDB Offline
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First of all, make sure that the soundboard is actually causing a problem. In my experience, that is quite rare. You have to eliminate everything else: voicing, sympathetic vibrations from other things in the room, bridge problems, etc.

Nowadays, the first thing I try with difficult problems is finding a replacement piano. I can often do that for less than the cost of repairs.


Semipro Tech
Re: Pointers on Sound Board Repair [Re: Duaner] #2894224 09/25/19 07:20 PM
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Chernobieff Piano Offline
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You have a 100 year old boat. And every time you take it out, the water comes in faster than you can pump it out? Do you keep grabbing the bubble gum? Or get a new boat?
-chris


Chernobieff Piano Restorations
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Re: Pointers on Sound Board Repair [Re: Duaner] #2894458 09/26/19 11:58 AM
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P W Grey Offline
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Duane,

Anything that was designed to be tight but is now not tight is suspect. LOOK for obvious loose rib(s), loose around edges, etc. FIRST look down in the bottom front and rear to see if anything is in there laying against the soundboard. CLEAN all dust and dirt out of there with a long bristle brush and vacuum. Extract anything in there that should not be there.

CHECK for a loose caster on uneven floor. Check them all. This can sound like a SB buzz. If one is not supported, shim it with cardboard, or if severe, a plumbers wedge or a piece of a shingle. All four casters must be supported fairly evenly.

I believe that repair scenarios for loose ribs, etc have been posted here numerous times. Take a look. Make sure the client is aware that their piano was designed to last about 30-40 years and then get rebuilt or replaced. The boat illustration is a good one.

Pwg


Peter W. Grey, RPT
New Hampshire Seacoast
www.seacoastpianodoctor.com
pianodoctor57@gmail.com
https://www.youtube.com/watch?v=PK0T7_I_nV8
Re: Pointers on Sound Board Repair [Re: Duaner] #2896876 10/03/19 06:31 PM
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Rick_Parks Offline
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What Peter said. Add, check the wood buttons on the back of the SB as well...
Had a bad buzz on a console a few weeks back-- devil of a time finding it till I touched the button smile Tighten screw. Done.

You can look up soundboard repair (if that is what it is). plenty of examples on here and online. Any questions you can shoot me a private message.


Parks and Sons Piano Service
www.parksandsonspiano.com
Re: Pointers on Sound Board Repair [Re: Duaner] #2896891 10/03/19 07:28 PM
Joined: Jan 2014
Posts: 219
AWilley Offline
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Here's a trick: if you can see that the end of a rib is visibly separated from the soundboard, try sticking a business card in the crack, as far as it can go down, and see if that makes the buzz go away. That's confirmation that the buzz is caused by the rib separating from the soundboard. I remember reading somewhere about drilling a small hole through, using a bolt to clamp the rib to the soundboard while the glue you inserted dries, then removing the bolt and plugging the hole. It's not something I've done myself, but it sounded like a good idea.


Anthony Willey, RPT
PianoMeter
Willey Piano Tuning

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