[Elecraft] K2 initial power ramp after band change

[Bob McGraw K4TAX]

I've noticed a bit of the same thing on my K3S.   Not an issue but I 
view as a nice safety feature preventing overshoot and over drive of my 
KPA500.

73

Bob, K4TAX


On 6/17/2018 7:07 AM, John Oppenheimer wrote:
> Hi Martin,
>
> The power ramp up is normal behavior. The K2 uses requested power
> control (Page 92, "Requested vs. Actual Power:" paragraph)
>
> With a per band set value (Page 111, "Microcontroller" paragraph, "ALC,
> which is used on CW to maintain the user-specified power level across
> all bands.")
>
> When changing bands, the output power is sampled by the microcontroller
> resulting with a change in the transmitter ALC to increase power. The
> ALC action requires a few dits or TUNE to complete.
>
> John KN5L K2 #7212
>
> On 06/17/2018 01:43 AM, Martin Sole wrote:
>> After a band change the first dit, or two, is not at full power.
>> There seems to be an initial ramp up after which all is good and I don't
>> see any fluctuation in power. Supply is 13.5 volts when producing full
>> power, about 13.9 with just the receiver running. Full power current on
>> 28Mhz is showing on the display as 2.66A. I can see the ramp up on the
>> bar graph, it shows one bar for the first 3-4 dots then ramps up to all
>> 10 bars. I have confirmed the same with an external power meter.
>> Anything I can do about this?
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