[Elecraft] K3 power output instability

[Don Wilhelm]

Arliss,

If you do not have the latest firmware loaded along with the latest K3 
Utility, please load the latest and try again.  If it continues to fail, 
contact K3support at elecraft.com.

73,
Don W3FPR

On 3/13/2013 11:12 PM, Arliss wrote:
> Running the low and high power TX gain calibration via the K3 Utility 
> gave the following result:
>
> "TX Gain calibration failed because power reading did not converge to 
> a consistent value.  5W calibration failed."
>
> "TX Gain calibration failed because power reading did not converge to 
> a consistent value.  50 W calibration failed."
>
> The low power calibration failed on 40 meters and stopped there.  The 
> 50 W calibration failed on 160 meters and stopped there.
>
> The radio also gave an error message: ERR TXG (Transmit gain constant 
> out of range).
>
> 73,  Arliss
>
>
>
> Arliss,
>
> I would suggest that you run the Transmit Gain Calibration and see if 
> that improves the situation.
>
> 73,
> Don W3FPR
>
> On 3/13/2013 9:10 PM, Arliss wrote:
> >I'm experiencing a problem with instability in power output >from my 
> K3/100.  No word back from Elecraft yet (it's only been >a few days), 
> so I thought I'd try here.
> >
> > The problem is that at relatively low power output levels
> >(approximately 10 to 40 watts), the power output does not >remain 
> constant.   If I engage TUNE, the power will vary >plus/minus 3 or 4 
> watts, then jump up briefly by as much as 10 >watts or more before 
> resuming smaller excursions.  Although the >power variations are 
> brief, they cause the grid protection >circuit in the amp to trip.  
> This behavior seems to be >independent of mode and frequency.
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