[Elecraft] K2 Speaker not muting?

[TMorton]

Hello,
In the CQWW cw contest I operated with K9VV as VP2VVV with K2/100 and 
wire antenna. On Saturday afternoon while Fred was operating, I suddenly 
could hear the K2 receiver even though Fred was using a headset. We 
changed headsets and that did not mute the speaker. I vaguely remember 
reading on the reflector about this before. I went to the elecraft 
website and tried a search but to no avail.
Anybody got the solution? I find it hard to believe that the front panel 
jack could 'wear out' this quickly. I have only used the K2 in contests 
about 4 times and the headphones typically go in on Friday nite and stay 
there until Sunday evening. Otherwise the K2 sits in a Pelican case 
awaiting its' next adventure.
BTW, we made 2700 Qs including 64 countries on 80m. This was with 66ft 
long sloping wire fed at the bottom and ground was 1" strap thrown over 
the jetty into sea water. The K2/100 was routed thru the KAT 100 for all 
band operation.  We only operated about 34 hours as we did not want to 
incur the wrath of sleeping xyls hearing both sides of cw contact so we 
did miss some prime time(s) at EU sunrise plus our own sunrise...yes, I 
know I could have 'popped' the top off and disconnected the speaker but 
swimming in the ocean and having a brewski precluded any 'technical' 
operations, HI.
Appreciate any suggestions,
73
Tom K6CT aka CX7TT