[Elecraft] KPA1500 / K3 Mystery

[Dick Dievendorff]

There is a required K3 enabling menu selection, something like per band power setting. It’s the same menu item that allows you to dial 20 watts for 20 meters, 30 watts for 30 meters, and have those choices retained as you move from band to band.

The amp status messages go over AUXBUS, a wire in the 15-pin ACC cable.  Is that OK? Does the K3 VFO frequency show up in the KPA1500 XCVR FREQ status screen as the VFO is moved? That K3 VFO frequency info flows over the same AUXBUS wire.

73 de Dick, K6KR



> On Oct 18, 2020, at 06:34, ockmrzr at gmail.com wrote:
> 
> I made a recent change to the "Band Change-> STBY" setting on the KPA1500,
> changing from NO to YES.  I did this to ensure the AMP doesn't have any wild
> SWR or PWR spikes before the ATU has a chance to "remember" it's setting
> after a band change.
> 
> 
> 
> Issue:  When switching the AMP from OPER to STBY, the K3 is supposed to
> switch from the drive power setting (~25 watts) in OPER, to 100 watts in
> STBY, it does not, it remains at the drive power setting.  I am 99% sure I
> have all the cabling and settings set correctly in the K3 and KPA1500.  I
> went through and manually reset the power settings on each band to let the
> K3 and KPA1500 "re-learn" the change made, however, still no joy.
> 
> 
> 
> Jim, W6YA, and I have been going back and forth, however neither of us have
> had any luck.
> 
> 
> 
> Do you KPA1500/K3 owners out there have any ideas or suggestions?
> 
> 
> 
> 73 de Bruce, N7TY
> 
> Yuma, AZ
> 
> www.qsl.net/n7ty <http://www.qsl.net/n7ty> 
> 
> 
> 
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