[Elecraft] K3/KPA-1500 - Unexpected shift in per-band power

[Bill Weaver]

Hi Pete,

Did you confirm that the drive power from the K3 was changing on 15M when you adjusted it on 80M and vice versa? I’ve never had this problem 160M through 6M. Sounds like something may be set wrong in the menu or a failure of some sort.

73,
Bill WE5P

Comfortably Numb

> On Mar 30, 2022, at 10:18, Pete Smith N4ZR <pete.n4zr at gmail.com> wrote:
> 
> For some time now, I've been noticing that after operating on 15M, my output power on 80  with my K3/KPA-1500 would have to be turned down substantially to get within legal limits.  Today I decided to test this, using a dummy load.  I tweaked my input power on 15M to about 1450 watts, and then went down to 80, where my output power hit over 1800 watts with the Power control on the K3 unchanged.  I turned down my K3 to get 1450 watts out on 80, and went back to 15.  Output power showed just over 1000 watts. Tweaked the K3's power setting to restore 15M output power to 1450 watts and went back to 80.  KPA1500 again showing 1800 watts out.
> 
> I had thought that K3 power settings on each band were independently stored and returned to the stored value for a given band when changing to that band, but this evidence suggests that is not true.  I don't think I'm overlooking something antenna-specific, since I was using the same dummy load on both bands, and I've noticed this phenomenon when using real antennas too.
> 
> -- 
> 73, Pete N4ZR
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