[Elecraft] Problem setting up K3s with WSJTv1.7

[Jim Miller]

As a quick sanity check I brought up N1MM+ with 2Tone using DOOK which is
analog.

ALC was easily set to a solid level at 5 bars.

jim ab3cv

On Thu, Jan 12, 2017 at 8:39 PM, Jim Miller <jim at jtmiller.com> wrote:

> I'm seeing some problems getting the audio right with 1.7 with my K3s. I'm
> in DATA-A mode.
> I'm using the K3s internal USB audio device.
>
> I have the power slider on WSJT near the max, setting it completely to the
> max causes K3s audio input overload regardless of where I set the Windows
> Mixer input slider. I have the Windows mixer levels for the K3 set to
> -7.7db. With these settings the K3 Input level shown on the mixer panel is
> about 70% when tone is asserted by Tune which seems acceptable, i.e. not
> saturated.
>
> I then adjust the LineIn level on the K3s. When the level is too low (e.g.
> 3) the ALC meter pulses with about a 0.5 second rate between no bars and 5
> bars. LineIn set to 4 shows the same pulsing but between 4.5 to 6 bars.
> Setting LineIn to 5 yield a more stable display but still oscillating
> between 6-7 bars.
>
> This pulsing/oscillation doesn't seem right to me. With a steady Tune tone
> from WSJT I would expect a steady rather than pulsing/oscillating ALC
> display.
>
> BTW, this is true even in K3S Test mode so no RF is being generated.
>
> PC is bonded to the K3s rather well.
>
> I even removed the K3S Aux connector to ensure something wasn't getting in
> that way.
>
> I'm also seeing a power spike on the initial tone assertion in Echo mode.
> So I did a TX gain calibration at 5 and 50w and still see the same. The
> power spike is what got me looking more closely at the ALC levels.
>
> My next test will be putting a scope on the K3S to look to see if there
> really is a RF power spike or something is screwy with my newish ACOM 1500.
> I haven't seen any power spiking on CW modes.
>
> I'd like to also look at the audio input level from WSJT but don't have a
> good idea on how to do that since the internal K3S audio codec is being
> used. Perhaps the headphone out level would show the spike (if it is being
> generated by WSJT) as well if AGC is off?
>
> Suggestions welcomed!
>
> 73
>
> jim ab3cv
>
>
>
>
>
>
>
> .
>
>
>
>
>
>