[Elecraft] KX3 firmware update (12-kHz audio spur fixed, etc.)

[Wayne Burdick]

Interesting. Well, I and a number of other testers have noted better fidelity, and the op who had measured the in-band OSB image at 20 dB reported that it had dropped significantly.

I've been listening to music in the AM broadcast band in SSB mode with FL2 engaged, and it sounds quite clean.

73,
Wayne
N6KR


On Aug 18, 2013, at 4:03 PM, John_N1JM <johnn1jm at gmail.com> wrote:

> No improvement here that I can detect in the weaver demod fix.
> 73,John N1JM
> 
> 
> wayne burdick wrote
>> Hi all,
>> 
>> We're putting the finishing touches on a KX3 field-test firmware release
>> that eliminates the 12-kHz audio spur reported earlier this week. I can't
>> hear it, myself, but I can see it on my spectrum analyzer. In our lab
>> tests the spur is knocked down into the noise -- around 20 dB reduction.
>> Hopefully this will do the trick.
>> 
>> The fix we implemented is an improvement on turning on the RX I/Q menu
>> entry. The new method only increases current drain by 3 to 4 mA, while
>> setting RX I/Q to ON increases current drain by about 10-15 mA.
>> 
>> This release also includes corrected "Weaver-mode" SSB receive
>> demodulation (greatly reduced opposite-sideband image), and all of the ATU
>> tuning improvements mentioned earlier.
>> 
>> If you've been bothered by either the Weaver demod issue or the 12-kHz
>> spur, please email me directly so I can send you the new code.
>> 
>> If you sent me a request earlier, and didn't get it yet, that's because I
>> was making further improvements. You're still on my list.
>> 
>> tnx
>> Wayne
>> N6KR
>> 
>> 
>> 
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:
> 
>> Elecraft at .qth
> 
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
> 
> 
> 
> 
> 
> -----
> 73, John N1JM
> K3 #5986
> P3 #1752
> KPA500 #596
> KAT500 #575
> KX3 #926
> XG3
> XG1
> 
> sent from my MacBook Pro
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/KX3-firmware-update-12-kHz-audio-spur-fixed-etc-tp7577798p7577847.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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