[Elecraft] KX3 and JT65 (aka digital modes) ALC "problem"

[Barry LaZar]

I have a SignaLink USB attached to my KX3. I jumpered the header IAW the 
directions on their web site. I did not turn off mic bias. It works fine.

You are correct. DATA A does turn off compression and the equaliztion. 
There have been a few notes going around the last few days about PSK-31 
and the KX3. Those notes are very informative and I suggest you do a 
review of them. They are applicable to all digital modes. I know I 
learned something that I had overlooked.


73,
Barry
K3NDM

On 7/20/2013 11:55 AM, Stephen Selberg wrote:
> 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
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net <javascript:;>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>