Young Chang lyre supports buzzing

[David Ilvedson]

Don,



While your on it...what is the best way to fix a loose pedal box on a Young Chang?   



David Ilvedson, RPT

Pacifica, CA 94044









Original message

From: "Don Mannino" 

To: "Pianotech List" 

Received: 7/11/2008 8:46:50 AM

Subject: Re: Young Chang lyre supports buzzing





Bruce,



It works well to re-locate the top of the lyre support.  The rods should really be pushing the lyre forward a little anyway, so by re-locating the tops of the supports slightly closer to the lyre, you "load" the system for best stability and strength.  It also stops the rods from buzzing.



It's also easy to do, as the wood on the bottom of the keybed is pretty soft.  Just remove the screws, drop the support rod down and plug the holes.  Then raise the rod back into position, and push the top of the support rod towards the lyre, and drive the screws back in at the new location.



While you're there, check that the pedal lyre isn't coming apart where the posts meet the box.  This could be the reason for the support rods loosening.  Fixing the lyre might also tighten the rods back up in the original location.



Don Mannino



----- Original Message ----- 

From: Bruce Dornfeld 

To: pianotech 

Sent: Thursday, July 10, 2008 9:29 PM

Subject: Young Chang lyre supports buzzing







I have a number of grand pianos built by Young Chang that I service that have the same trouble.  The lyre support brackets vibrate or buzz with some frequencies when the piano is played.  When all of the screws are tightened, there is too much play in the hinge.  This is most often causing noise at the top of the lyre support, but sometimes at the bottom too.  Sympathetic vibrations are always a pain, but I do not know how to fix these. 



This week, I removed a pair of them to repair,  First, I tried hitting the pin with a ball peen hammer with the other end on an anvil, but it only made it flatter outside of the hinge area.  Previously, I have tried wrapping some yarn around it, but it did not last.  I have considered squeezing the bracket around the pin, but is looks like cast metal and I am afraid it might just break.



There are tons of Young Changs out there.  What are you all doing to keep the lyre support brackets from vibrating along with the music?  I can't be the only one having trouble with these!  Help me!  Please! 





Bruce Dornfeld, RPT

bdornfeld at earthlink.net

North Shore Chapter
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