C key not sealing

mg172

New Member
Messages
2
Location
Florida
#1
When I press down C natural I can see that it does not fully seal, but then I press B flat and it is fully sealed? Is it the C key itself or pad?
 

Stephen Howard

Well-Known Member
Messages
1,313
#2
There are three pads which need to close when you play a (middle) C: The A key pad, the Bis Bb and the Auxilary B.
The A key is the one you press when you want to play C, the Bis Bb sits beneath the bit you press (the touchpiece, fitted with a pearl) and the Aux. B is the small pad situated at the top of the 'stack'...just above the B key.

Between the A key and the Bis Bb key there should be a buffer. This will be either a piece of cork or a piece of felt, and its job is to ensure that the Bis Bb closes at exactly the same time as the A does. If this buffer is worn or missing, the Bb will be unable to close - and from what you describe, this would appear to be the problem. If the buffer is missing it usually results in a clanking noise as you press the A key.

However, there are other reasons why the A key may not be closing the Bb. It could be because the A's touchpiece arm has been bent upwards (often due to poor handling when pulling the horn out of its case) or a fault in the regulation between the A and the Aux.B key.
And it may also be down to poorly seating pads.

The first step, then, is to check whether you still have a buffer between the A and the Bis Bb.
 

jbtsax

old and opinionated
Subscriber
Messages
6,587
Location
Beautiful Springville, Utah USA
#4
The small key cup above the B is also sometimes called the C key. The key you press to play the note C is called the A key---it can be confusing. :confused: A leak light in the sax is a good way to diagnose the problem. It may be a good idea to take this one to a tech to sort out. Upper stack regulation can be a bit challenging even for those of us who do it a lot---especially when there are no "adjusting screws"
 

mg172

New Member
Messages
2
Location
Florida
#5
There are three pads which need to close when you play a (middle) C: The A key pad, the Bis Bb and the Auxilary B.
The A key is the one you press when you want to play C, the Bis Bb sits beneath the bit you press (the touchpiece, fitted with a pearl) and the Aux. B is the small pad situated at the top of the 'stack'...just above the B key.

Between the A key and the Bis Bb key there should be a buffer. This will be either a piece of cork or a piece of felt, and its job is to ensure that the Bis Bb closes at exactly the same time as the A does. If this buffer is worn or missing, the Bb will be unable to close - and from what you describe, this would appear to be the problem. If the buffer is missing it usually results in a clanking noise as you press the A key.

However, there are other reasons why the A key may not be closing the Bb. It could be because the A's touchpiece arm has been bent upwards (often due to poor handling when pulling the horn out of its case) or a fault in the regulation between the A and the Aux.B key.
And it may also be down to poorly seating pads.

The first step, then, is to check whether you still have a buffer between the A and the Bis Bb.
There is a felt bumper, I feel like it might be worn out and too soft to actually press down the key. Not sure if it could be that.
 
Messages
104
Location
Canada
#6
There are three pads which need to close when you play a (middle) C: The A key pad, the Bis Bb and the Auxilary B.
The A key is the one you press when you want to play C, the Bis Bb sits beneath the bit you press (the touchpiece, fitted with a pearl) and the Aux. B is the small pad situated at the top of the 'stack'...just above the B key.

Between the A key and the Bis Bb key there should be a buffer. This will be either a piece of cork or a piece of felt, and its job is to ensure that the Bis Bb closes at exactly the same time as the A does. If this buffer is worn or missing, the Bb will be unable to close - and from what you describe, this would appear to be the problem. If the buffer is missing it usually results in a clanking noise as you press the A key.

However, there are other reasons why the A key may not be closing the Bb. It could be because the A's touchpiece arm has been bent upwards (often due to poor handling when pulling the horn out of its case) or a fault in the regulation between the A and the Aux.B key.
And it may also be down to poorly seating pads.

The first step, then, is to check whether you still have a buffer between the A and the Bis Bb.
That you for this also. That was well explained.
 

Stephen Howard

Well-Known Member
Messages
1,313
#8
There is a felt bumper, I feel like it might be worn out and too soft to actually press down the key. Not sure if it could be that.
If it's worn (more commonly, compressed), it won't be by much. When you press the A key down it'll leave the Bis Bb pad just a fraction of an inch shy of closing...maybe just enough to slide a piece of paper between the pad and the tonehole.
If the gap is any larger than that it probably means you're dealing with a bent key.
 
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