[Elecraft] K3: Draws high current on XMIT on 30 meters only

[Ted Roycraft]

My K3 is having a problem on 30 meters but is fine on all other bands.  
While transmitting into a 50 ohm dummy load and verifying that the SWR 
is better than 1.1:1,  if I set the output power level above 80 watts on 
30 meters, I get a "HI CUR" message.  When that happens, the K3 
indicates that it is drawing slightly more than 24 amps and the voltage 
as measured by the K3 is 12.6 volts.  This current level is quite a bit 
higher on 30 meters running 80 watts than on any other band running 100 
watts.  Any ideas why the behavior should be so different on 30 meters?  
By the way, I don't have the ATU.  Also, I don't think this just 
happened recently.  I bought the K3 a year ago and it might have been 
this way from day 1 but I'm retired and it takes a while to get around 
to things :-)..

Thanks and 73,
Ted, W2ZK