[Elecraft] K2 Speaker Replacement

[Stuart Rohre]

James,
Before replacing, it may be that you only knocked it off center of the voice 
coil.

Take out the speaker and view it from all angles.  Is the Cone off center?

If the thing looks like it is, you might put three fingers and thumb equally 
around edge of voice coil at narrow end of cone, and push in gently and 
release.  This might restore the centering.  If not, you have not lost much 
time.

There is also the possibility that you had such as strong signal that you 
magnetized part of the frame of the speaker.  That is more tricky, but you 
might use a compass to see if symmetrical positions around the speaker frame 
circumference the compass needle deflects the same amount.  You do this by 
putting speaker in a circle you have drawn on paper by tracing around the 
magnet.  Now, carefully tie a string onto compass so that you may keep it a 
defined distance from the framework as you move it to differing positions. 
Keep string taut between frame and compass for each datapoint.  You could 
record the amplitudes as so many degrees from North, 0 degrees.

If you find a very unsymmetrical magnetic field plot, you might as well 
order a replacement speaker from Elecraft.  You might be able to degauss the 
frame with a VCR tape hand held degausser of the Hockey Puck style that Hi 
Fi shops used to sell, but you do not want to degauss the permanent magnet 
at the back of the cone.

GL, 73,
Stuart
K5KVH