K2#4155 speaker/audio

[Joe Ford]

Lyle, You da' man.

I thought I might have over tightened  the screws and bent the frame but
it was perfectly straight. When I emailed Gary, one of the things he
suggested was to do a little *gentle* prying between the magnet and the
frame. That went right over my head. Your mentioning the weight of the
magnet lit the light bulb over my head.  I never even noticed that the
strut with the terminals was caved in. Raising that just a little and
now it sounds normal.

Thanks, Lyle, I really appreciate your help. You made my day. I've been
worrying with this for days.

73,
Joe
K4NVJ
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[G3VVT]

Used to get this problem with speaker distortion on occasion when repairing  
TVs in the early 1960's, usually at a remote farmhouse three days camel ride  
from base. Found the easiest method was to remove the speaker and stand it on  
the magnet with the cone facing you. Carefully work the cone with both hands
to  equalise the pressure, backwards and forwards towards the magnet feeling
for the  voice coil rubbing. If there was a problem it was sometimes possible
to warp the  speaker frame to re-center the voice coil as a temporary fix. As a
matter of  procedure the speaker was replaced at a later date when a spare
became  available as the problem could re-occur.
 
Unlike the problem with the Elecraft speakers where it looks like the  damage
may be caused by rough handling in transit, these speakers  failed after a
period in service possibly due to excessive temperature or  humidity. Elecraft
could have to review the packing of these speakers for  transit if the amount
of damaged units becomes a problem.
 
Bob, G3VVT
K2 #4168
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