Probrem of harsh noise and feel a high pressure on E4

[genepinefield]

Hi
When I pull the bellows of the E4 button, I hear a harsh noise and feel a high pressure.
I removed the reed shoe from the reed pan and inserted some A4 paper into the gap to clean it, then flicked it, which improved the problem a little. However, it soon returned to its bad state.
There is no problem with the reed when I press the bellows.
I will try replacing this reed shoe with push later to see what happens.
Do you have any other advice?

 

[Geoff Wooff]

It  could  be that  the  reed shoe  is  slightly  loose  in  the  reedpan  which  would  cause it  to  rattle  when  played.  Try  pushing    the  reed  fully  into  the  slot  and  check  that  it  feels  secure.

  

Edited January 25 by Geoff Wooff

[Lappy]

You can also shim the shoe with a strip of paper.  Sometimes, bending a slight curve into the reed will help.

Edited January 25 by Lappy

[Tiposx]

The valve might be sticking. That would be the one on the bellows side of the fondo.

[genepinefield]

Hi
When I swapped the reed shoe for the pull one and reversed push/pull , the same problem occurred when pushing, so I realized the cause was the pull reed.
I found a gap in the valve that action side, so I reattached it, but that didn't improve anything, which is another thing I noticed.

Edited January 26 by genepinefield

[Tiposx]

Does the photo show that one of the valve limiting wires is lying against the valve? If so then that is the problem. The wire would need to be extracted. It is likely to be corroded where it is attached to the wood. It should be replaced, but the valve will work to some degree without it

[genepinefield]

15 hours ago, Tiposx said:

Does the photo show that one of the valve limiting wires is lying against the valve? If so then that is the problem. The wire would need to be extracted. It is likely to be corroded where it is attached to the wood. It should be replaced, but the valve will work to some degree without it

Hi
Valve limiting wires is not touch with the valve, The wires are floating.
Thanks reply. 

[Chris Ghent]

You mention feeling high pressure; the causes of this could be a reed jamming in the frame or a valve sucking into its vent. 

[fred v]

The outer tip of the reed may be too close. It should stick up above the level of the shoe a tiny bit. If it is too close to the slot It will require more pressure to get it to vibrate. Carefully lift the reed up bending it slightly to alter it's set position.

[Wally Carroll]

I find loose notes to be the most common issue that can arise but as Chris pointed out, a feeling of higher pressure would indicate a restriction in airflow.  The tongue could be brushing one side or other of the frame. The tongue may look centered when the reed is outside the instrument but can become off-centered when installed if the wood is squeezing the brass frame into the tongue.  This can happen with humidity changes.  First make sure the note is not loose then check to see if it is off-centered.  Here are a couple of videos:
 

 

 

 

[genepinefield]

Thanks everyone.

I tried loosely placing the reed frame on the reed pan, the rattling noise, abnormal sound, and strong pressure were resolved.

Reed tounge is seems not touch to reed frame.

 

 

 

Edited February 5 by genepinefield

[Wally Carroll]

It sounds like either the tongue is being squeezed into the frame when the shoe is pushed fully into the pan or that the tongue tip is making contact with the wood when fully pushed into the reedpan. Most likely it is the first issue as the instrument has been around for awhile presumably without this problem. To confirm you could push the shoe fully into the pan and check with the light table, or you could leave it alone if it is now working for you.  The problem you may experience though is that the shoe may come loose once the humidity increases and the pan expands with changing seasons.