The usual K2 headphone jack failure results in the speaker going dead.  To fix 
it requires replacing the jack, but a workaround is to short two pads together. 
 The speaker will then run all the time, whether or not there are headphones 
plugged into the front of the rig.  The speaker can be cut off by inserting a 
plug into the external speaker jack or by a switch.  I put a photo showing 
which pads to jumper together on my web page. The link (and brief text) are 
near the bottom of this page: http://www.qsl.net/ve3sma/downloads2.html while 
the photo itself is at 
http://www.qsl.net/ve3sma/K2HeadphoneJackSwitchBypass.jpg Thanks to Don, W3FPR, 
for identifying the correct pads for me. 73,Steve VE3SMA
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