Re: K3 power adjustment


Rick NK7I
 

The problem with using the software slider in WSJT-X is that it's not a power control, but audio drive.  If you give the low audio to the Elecraft line with the power set at 100 watts; the radio will 'hunt' in it's attempt to produce the 100 watts.

In that hunt, any other audio within that loop will be transmitted; meaning that while you are making contacts, you're also likely transmitting products other than the JT tones.  That other audio is likely causing issues for others in the band.

A responsible operator wants the cleanest output possible to both focus the energy in the wanted spectrum and also to be a good spectrum neighbor (stay within the lines, don't add noise).

Having the correct audio drive (4 bars lit, 5th barely tickled) and using the RF output power control on the K3, is the proper way to manage RF output to meet those goals.  It is the responsible way and helps to keep the noise down.

73,
Rick NK7I


On 4/24/2021 6:11 AM, Sandor wetsel wrote:
I won't argue right or wrong way, the way I do it works great and I make the contacts I want make.  I avoid, at all cost, triggering the ALC so that limts the audio drive I feed the rig. 40 watts max out (rig set to 100) so I am NOT "one of those"


GOD SAVE OUR NATION!

On Sat, Apr 24, 2021 at 7:54 AM, Dave Cole
<dave@...> wrote:
Sandor,

If you are using a K3, the correct method for adjusting power is to use
the radio power control, and just trigger ALC action by adjusting the
slider.  Else you run the risk of of being one of "those" stations.

Just because you can do a thing, does not make what you are doing the
correct way to do it.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 4/24/21 3:42 AM, Sandor wetsel wrote:
> Funny, It works on my K3.  Like I said I can adjust from mW-100 watts
> nusing only the sliders
>
> Sandor Wetsel KG4FET
> MAY GOD SAVE OUR COUNTRY!
>
>
> On Friday, April 23, 2021, 04:28:06 PM CDT, Bob McGraw - K4TAX
> <rmcgraw@...> wrote:
>
>
> Nice, but that does not work correctly on the K3 or K3S. They require a
> specific audio input level regardless of power output and power is
> managed by the power control on the radio.
>
> 73
>
> Bob, K4TAX
>
>
> On 4/23/2021 4:25 PM, Sandor wetsel wrote:
> You can use the volume control slider for you computer, the software or
> on the interface to accomplish this.  I keep all of my rigs set to 100
> watt out and use the soundcard volume control to adjust actual power out
> from mW to 100 watts.
> Sandor KG4FET
>
> GOD SAVE OUR NATION!
>
>    On Fri, Apr 23, 2021 at 3:48 PM, Wes Stewart via groups.io
>    <n7ws=yahoo.com@groups.io> <mailto:n7ws=yahoo.com@groups.io> wrote:
>    Different strokes.  I don't know how you can determine what's
>    "suitable" for me.  I just leave the KPA500 in line, throttling down
>    the drive on 30 and 60 meters and I still don't work everyone I call.
>
>    Wes  N7WS
>
>    On Fri, Apr 23, 2021 at 11:32 AM, Jim Brown wrote:
>
>        On 4/23/2021 10:30 AM, Bob McGraw - K4TAX wrote:
>
>            I just set my radio to 100 watts and forget it.
>
>        That's more power than is suitable for the HF bands. Most
>        FT8/FT4 users
>        work in the range of 25W on the HF bands. I run legal limit with
>        WSJT
>        modes only on 160M to work EU from my QTH near San Francisco,
>        and for
>        weak signal work on 6M (meteor scatter, ionospneric scatter, tropo,
>        multi-hop E-skip).
>
>        73, Jim K9YC
>
>





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