[Elecraft] KX3 and JT65 (aka digital modes) ALC "problem"
Stephen Selberg
ke6gda at gmail.com
Sat Jul 20 11:55:03 EDT 2013
Hi Stephen,
I used my kx3 for jt65 once when I first got it to see how it would work. I
can't recall what the ALC looked like tho. I bought a special signalink USB
and the jumper board to store in my kx3 go case so i wouldn't have to
disconnect all the cabling in the shack with the main signalink. As time
permits today, I'll pull everything out and set it up and let u know how
it looks on my end.
As far as the data A, I believe from what I read in the manual that it
turns off all tx/RX equalization as well as compression. I also recall
reading somewhere with the signalink USB, if the jumper board is not
installed, the mic bias menu setting should be set to off. If u have the
pre made jumper board installed mic bias can be left to on. Since u have
yours connected to the computer, I'm not sure how that setting will affect
operations.
Sorry for all the typos and poor syntax. Writing all this while my
14-month-old is running circles around me getting into everything hihi....
73,
Steve KS6PD
On Friday, July 19, 2013, Stephen M. Shearer wrote:
> I am not new to JT65.
> I have an ALC “issue” in that I have no ALC, but I can change the computer
> drive and watch the RF power change from zero to 3 watts (power setting –
> but not over 3w) AND I am making contacts (and with similar signal strength
> both paths)…
> I am working Europe and I am heard in eastern Europe (5300 mi) via
> “reporter” – SO, it “is” working.
> BTW, I have tried different mike settings all the way to full drive.
> I am connected direct from the PC to the KX3 via the optional cable set.
> I also took the time to flatten the RX and TX EQ settings.
> Didn’t help the ALC “issue” but the flatter RX can be seen by the JT65
> waterfall – as it is flatter as expected....
>
> I “guess” if it works, don’t fix it…
> I will try RTTY or PSK, too and see what it does to ALC.
> What do others see who are running JT65 on your KX3?
> Does JT65 have a “voice” that the DSP/ALC doesn’t “see”?
>
> After I wrote the above and posted to the KX3 group, (with no reply)...
> Today I tried PSK using WinWarbler and found:
> Same problem, until - for some reason - I lowered the mike drive
> (earphone output) from 60 to 6 and ALC appeared!
> I guess I didn't change the computer drive enough.
> It appears that ALC goes to zero when over driven? Feature or problem?
> Things still "seem" to work as I made a 20M 4W PSK31 QSO (poor copy on
> other end - running 20W).
> And a couple of JT65 contacts...
>
> Question, does DATA mode use the TX/RX EQ? It would be nice to leave the
> EQ's set for SSB and have things flat for digital modes.
> I guess I need to do some more reading.
>
> 73, Steve WB3LGC
>
>
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