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carmark13

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 #1 

Hello all.............just got this used EAD Hohner Corona Classic, and I noticed that the top three buttons on all rows lose alot of air as I press them (I am pushing or pulling the bellows way out on these buttons only).  The other buttons below seem to be fine.  I talked to a fellow box player in town, and he stated his Scala does this on just about all the buttons.  He said he took the treble side apart on his box and noticed some screen covering that was rusty or deteriorated (I really didn't know what he was describing).  Does anyone here know what may be causing this (and is there an easy fix)?  Other than this, I love the Corona, but the bellows pushing/pulling way out is kind of annoying.  Any answers would be greatly appreciated..............Gracias all, Mark.

elpirishuiris

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 #2 
It could be that one of the reeds out of the two on each button is broken.  So only one reed is sounding and the other is just drawing air.  That they are the top three might just be a coincidence.

elpirishuiris

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 #3 
But you say it does the same thing in both directions.  So that defeats my theory.
carmark13

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 #4 

Yes elpirishuiris              I do get the correct sound when I press these buttons, but they also take in/out alot of air rapidly when pressed.

squiz1box

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 #5 

I would check to see if the reeds might have fallen off on one side. That was happening to a used Castiglione I bought. I replaced them. As I was making some tuning modifications and then they appeared out of the inside bellows folds.

luistorres344

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 #6 
Puede ser que las parte que tapa el oyo de la reed no este sellando vien quita el grill y aplanas la tapita del boton quesea y asi te vas a dar cuenta si es eso, si es eso pues nomas es de emparejarlas machukandolas con cuidado asta que selle, si no pos despegando la patita que tapa el oyo del reed, ponerlo donde selle bien y volverlo apegar. Lo mismo ise yo con una que tenia se oyia que soltaba el aire por las patitas donde entrael aire al reed, solamente le puse presion asia abajo y sello bien.

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carmark13

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 #7 

Gracias guys for all your help.  After playing it some more, I realized that it is only the top 3-4 buttons on the outer row of buttons that makes the bellows pull out faster (not on all the top buttons of all the rows as I had stated earlier).  I noticed that as I push these tops few buttons in, the bellows pull out rapidly on their own, without me pulling them out.  The rest of the remaining buttons are fine with the bellows.  I will have to open up the treble reeds to see what you are talking about (luistorres344).  Again, any help/ideas would be greatly appreciated.  I also thought about switching the treble reeds from a compadre to this corona classic, to see if it is the reed.  I didn't see much information on this site about doing so.  Is this easy to do?  I have heard yes and no, and am a little hesitant to try to do so.  Gracias again muchachos (y muchachas)............Marcos.

tim_g_schofield

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 #8 
Make sure the reed block has not shifted out of alignment. Each block should be aligned over the holes in the treble case, if not you can have air escape. Also check to make sure the block is setting flush, sometimes the hold down bracket may not be tight and you can have air leakage at that point.
carmark13

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 #9 
Thanks alot Tim.......I will check those two things out.  I appreciate your response very much, and all the help this forum provides as well.  Thanks guys.
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