[Elecraft] K-3 with High Current Problem on 20 meters

[RLVZ at aol.com]

My K-3 has a high current problem on 20 and 30 meters but all of the  other 
bands are normal. 
 
Example currents into a Dummy Load as read on both the K-3 and Astron PS  
ammeters are:
 
-20 meters @ 40 watts draws 19 amps.  
-20 meters @ 100 watts the "High Current" warning message comes on and  
draws 28 amps on the Astron.
 
All other bands 160-6 meters, 40 watts draws an average of 12 amps and 100  
watts an average of 20 amps.
 
Any idea what the K-3's problem is on 20 & 30 meters?
 
Thanks,
 
Dick- K9OM