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

[JAMES ROGERS]

My K3 exhibits the same problem on 20M. I have to reduce power down to 90W to run without the Hi Current warning with an antenna match of 1.1:1. All other bands, no problem. I upgraded from a 30A switcher to a 35A linear supply to see if that helped and there was no appreciable difference.  I do run my station power through a RigRunner for power distribution. I am considering building a properly fused cable and trying a direct connection to the power supply, although the voltage sag on key down appears to be only about 0.8VDC.

73s Jim, W4ATK
On Jun 1, 2011, at 11:35 PM, RLVZ at aol.com wrote:

> 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
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JIM ROGERS, W4ATK
w4atk at bellsouth.net
http://web.me.com/jimrogers_w4atk
K3/100 P3
K2/10