In a message dated 22/12/05 11:42:04 GMT Standard Time,  
[EMAIL PROTECTED] writes:

I  partially  understand how a speaker works 
and in order to decrease  its audio  output I will have to remove or 
partially 
remove the paper  which joins  the core to the outer body - but will it still 
vibrate  ?.  Any  suggestions would be most  welcome.



Hi John,
 
The most probable answer is no as the paper cone centralises the voice coil  
within the gap between the magnet poles. Without this centring effect the  
voice coil would just jam against the magnet poles and the output would be  
extremely low. This effect is noticeable when the voice coil is placed off  
centre 
by the paper cone. A low and distorted output is all that occurs as has  been 
noted on some K2 with damaged speakers.
 
Another solution may be to use one of the old type headphones with a metal  
diaphragm under the screw on earpiece. Another way would be to convert the 
morse  signal to some visual form such as for displaying on an oscilloscope or 
use 
a  morse reader. Compared to the human brain however, all the morse readers I 
have  tried come off very much second best.
 
Bob, G3VVT
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