[Elecraft] K3 / KPA500 band switching oddity

[Bob McGraw K4TAX]

I change bands from the computer running WSJT-X.   The K3S follows, the 
KPA500 follows and the KAT500 follows.  All seems good to me.  I do have 
the KPA500 go to STBY on band change.  This is a user menu item.

I don't push buttons on the KPA500 to change bands.

73

Bob, K4TAX


On 10/27/2019 2:48 PM, Jim Spears wrote:
> I recently tripped over an oddity in the way the K3 <-> KPA500
> communications handle band switching when commanded from software vs button
> pushing.
>
>   
>
> Scenario 1:
>
> -          KPA500 is set to go to Standby on band change
>
> -          Operator sets KPA500 to Operate
>
> -          Operator makes QSOs or not
>
> -          Operator changes bands from either K3 or KPA500 button push
>
> -          K3 and KPA500 change bands
>
> -          KPA500 goes to Standby
>
> -          K3 gets the word and resumes full output power
>
> -          All is right in this little corner of the world
>
>   
>
> Scenario 2:
>
> -          KPA500 is set to go to Standby on band change
>
> -          Operator sets KPA500 to Operate
>
> -          Operator is making QSOs with WSJT-X, needing amp to work that
> "rare one"
>
> -          Operator uses WSJT-X to change bands
>
> -          K3 and KPA500 change bands
>
> -          KPA500 goes to Standby
>
> -          K3 does NOT get the word and operates as if the KPA500 were still
> in Operate, putting out low power vs the 100 watts expected
>
> -          K3 and KPA500 are out of synch with respect to Operate vs Standby
>
>   
>
> I do not think I have seen the case when using WSJT-X to command band
> changes where the KPA500 is in Operate and the K3 is at full power.  this
> would not be good.
>
>   
>
> So the issue seems to be band changes being commanded by software and not
> button pushes.
>
>   
>
> Anyone else seen this?
>
>   
>
> Jim
>
> N1NK
>
> K3 s/n 6xxx
>
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