[Elecraft] High Current only on 20 Meters

[Bob McGraw K4TAX]

I would run a TX gain calibration using the K3 Utility and a 50 ohm dummy load.   Then with an external power meter and dummy load, observe the power output on each band.   Be sure the ATU is bypassed for this measurement.   This would isolate the issue to the PA, ATU or low pass filter which is band dependent. 

Bob, K4TAX


Sent from my iPhone

> On Mar 4, 2020, at 12:46 PM, Leroy Buller <lee.buller at gmail.com> wrote:
> 
> I have a K3 that seems to have a problem.  I am getting HI CURRENT warning
> only on 20 meters.  The antenna is matched.  80, 40 and 15 do not have the
> issue.  The current meter on the power supply does show quite a bit of
> current (20+ amps) on 20 meters but when I reduce power it stops giving me
> the issue on 20 meters.  When I reduce power on 20 meters, the high current
> goes away around 65 watts.
> 
> Anyone have an idea what is going on?  I do appreciated the help
> 
> Lee - K0WA
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