[Elecraft] [K3] Issue with HI CUR on 12m

[Bob McGraw K4TAX]

Is the power supply at 14 volts or so?  And what does the radio show the voltage to be in key down transmit into a dummy load.   Low voltage will demand more current to produce 100 watts. 

I run my supply at 14.25 V no load and the radio shows 13.8V during 100 watts transmit.  Voltage drop should be 0.5 volts or less. 

Bob, K4TAX


Sent from my iPhone

> On Jan 11, 2020, at 10:31 AM, Bill Coleman <aa4lr at arrl.net> wrote:
> 
> Back in early December, I installed two KSYN3As in my K3 SN 7071. Sometime after that, I noticed that on 12m, I’m seeing a HI CUR indication when I set the power level to more than about 80-85 watts. The K3 will back off on the power level, then slowly ramp back up until it hits HI CUR again.
> 
> I don’t remember seeing this before. After the KSYNC3A install, I ran the transmit gain calibration at both 5 and 50 watts, as specified in the instructions. Just in case something went awry, I ran it again.
> 
> I’m still seeing this problem. What causes HI CUR at 85 watts? The K3 ought to be able to produce over 110 watts on 12m.
> 
> I’m not seeing this issue on other bands.
> 
> No issues with calibration 
> Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
> Web: http://boringhamradiopart.blogspot.com
> Quote: "Not within a thousand years will man ever fly!"
>            -- Wilbur Wright, 1901
> 
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