[Elecraft] K3: Still unable to set power correctly in, DATA A(sigh)

[Steve Ward]

"Joe Subich, W4TV" Wrote:

>So?  Reduce the power you request to get the required output. 
>What other radio has a "calibrated" power output control?  

>The wattmeter in the K3 is relative ... there is a documented 
>power vs. frequency slope.  Testing seems to indicate there 
>are also nonlinearities with changes in peak to average ratio 
>and as the power level moves away from the calibration points. 
>The directional coupler in the K3 does not have the high level 
>of directivity and compensation of a product like the Telepost 
>LP-100 nor does it have the high quality detectors. 

>If you want a bloody laboratory grade meter, buy a laboratory 
>grade power meter.

The point is it was providing the correct power output levels before the last couple of firmware revisions.  Something changed that made it go from putting out approximately the right power level, to putting out WAY TOO MUCH (i.e. causing splatter) power.

Setting TXG VCE to -3 dB gets DATA A output almost to where it should be, but of course adversely affects SSB.

This is NOT about the accuracy of the wattmeter, its about overdriving the PA.

73,
Steve
AD7OG
K3 #1544