Don is absolutely correct on his earlier points. The K3S setup and
operation does not follow the suggestions for setting the audio levels
as other radios and as described in the WSJT-X user information.
In DATA mode, it is my view that A L C stands for AUDIO LEVEL CREST.
i.e. the highest point, level or degree. It does not, in my terms,
stand for Automatic Level Control as understood by many and as used on
many other radio brands. Although, in SSB mode, the the normal
convention of understanding with ALC does apply.
With regard to WSJT-X, there is provision, in the AUDIO tab to have the
levels remembered by band for Transmit and Tune. I find with these
boxes checked things work quite well. Just remember that the transmit
data level can or will be different than the tune level. Thus some
minor adjustment of the PWR slider in the software may be needed between
TUNE and TRANSMIT. Once done, all other things remaining static, the
power from band to band and day to day remain precise as one desires.
In my measurements, in DATA A mode with a single tone applied, I find
that any audio level where the A L C indication {AUDIO LEVEL CREST} is
less than 4 bars will allow the power control circuit in the radio to
"hunt". The result will be observed as a slow power increase.
I'm stubborn, hard-headed and have used many other brands and models of
radios in the past. As I've said before, I had to learn to use the K3S
as it is intended, thus it is not like other radios in this respect.
Once done, you'll be much more satisfied with its outstanding performance.
73
Bob, K4TAX
K3S s/n 10163
On 9/8/2017 7:36 AM, Don Wilhelm wrote:
Bret,
This is a condition we call "Power Hunting", and it usually indicates
that you do not have the audio level set correctly for Elecraft
transceivers.
Are you driving the audio to illuminate 4 bars on the K3S ALC meter
with the 5th bar flashing? You must operate Elecraft gear differently
than other transceivers because of the closed loop system used for
power control is different than the simplistic "control the drive
level" system that other transceivers use.
Ignore the internet (and WSJT-X) advice which tells you to adjust the
power with the audio level and set the power to maximum.
With Elecraft gear, set the audio as instructed in the manual and
adjust the power with the POWER knob.
73,
Don W3FPR
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