[Elecraft] KPA3A and 6 meter TX Gain Calibration

[Dick Dievendorff]

2. The K3Utility displays the results of the most recent calibration it performed. 

73 de Dick, K6KR



> On Nov 9, 2023, at 18:13, Michael Carter via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> Last weekend I installed the 100 watt PA module (KPA3A)
> in my K3/10 (S/N 67xx).  I used the K3 Utility to perform the TX Gain
> Calibration at the 5 watt, 50 watt, and 1 mW levels - all
> completed successfully.  However, when I read the
> firmware update page I found that one should perform
> the 6 meter TX Gain Calibration after adding attenuation
> in the transmit signal chain.  I followed the instructions
> on the firmware page and found a new value of the TX Gain
> parameter on 6 meters (28 vs.  the 05 value obtained after
> the automatic calibration routine finished).
> 
> Question 1: was the originally determined TX Gain value
> on 6 meters adequate or was it actually necessary to
> insert attenuation and then calibrate the TX gain on that
> band?
> 
> After performing the manual TX Gain Calibration on
> 6 meters only (with attenuation in place), I tried to
> check the gain value using the K3 Utility.  However,
> it seemed to retain the previously found value of 05.
> 
> Question 2:
> Does the K3 Utility peek into the TX Gain table and
> give the present values, or does it retain the table
> found at the previous TX Gain Calibration?
> 
> 73,
> Mike, K8CN
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