The system operates quite well and reliably as designed. The radio
remembers the last power setting when the amp was in OPER mode. When
switching from STBY to OPER the power value is set per the last value
used. I find turning the amp off and on has no affect on this.
Once the correct power value is set for the amp in OPER mode and for the
individual band, I find no need to change the power setting. If one has
it correct....... then changing it would seem to make it no longer
correct. This makes no sense to me.
In my case, 18 to 25 watts, depending on band, is the value of power
used to drive the amp to 500 watts rated output. Except for 30M where
power value is 10 watts to comply with the 200 watt band power
limitation. In either case, I see no reason to increase drive power as
this would most likely overdrive the amp. All values were determined
using a reliable external power meter and 50 ohm dummy load.
73
Bob, K4TAX
On 3/12/2020 9:53 AM, Andy Durbin wrote:
"The misconception is that there are presets and there are NOT, the K3s stores the last set power for
that band/Amp Mode. The "presets" are the last power setting the operator made either manually or
via software/macro based on the amplifier mode (OPER/STBY). IF you adjust the K3s power then you changed the
"preset" for the amplifier mode/Band ."
That scheme seems to be set up to trap the operator. I chose to hard code the
band power limits and to limit the range of manual adjustment to 120% of band
max power limit when KPA500 OPER is active. That scheme allows me to make any
reasonable power adjustment for the current operating situation but I revert to
the hard coded power settings on band change.
I could of course change my hard coded values to be user adjustable presets.
However, I have not needed to change them for a long time so I didn't think
the extra coding effort was justified.
73,
Andy, k3wyc
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