[Elecraft] KX3 Spur/Birdie on CW Receive

[James Bennett]

Wow - this is strange! I posted this last week and got an answer fairly quickly - it was a setting in the tech mode menu that resolved it. Thought it was all done. Then this morning around 08:30 local time I got a couple messages that my post had been accepted from the reflector, and it all started over again!

Anyway, the “problem” is resolved on my end and now it looks like something funky is going on with the reflector.

Jim / K7TXA


> On Jun 19, 2024, at 9:39 AM, Greg <greg.ab7r at gmail.com> wrote:
> 
> Calibration process is in the KXFL3 installation manual.  Let me know if you need the XG3.
> 
> 73
> Greg
> 
> On Wed, Jun 19, 2024 at 9:34 AM Greg <greg.ab7r at gmail.com <mailto:greg.ab7r at gmail.com>> wrote:
>> Hi Jim!
>> 
>> Do a search in the KX3 manual for IMAGE.  Two things to try.  One is a setting in the 160bcb menu.  More likely it is the RX image rejection.  I have not looked at the instructions to do it but you will need a 160-6 signal source.  If you don't have one you can use my XG3.  The instructions should be on the elecraft website.
>> 
>> 73
>> Greg
>> 
>> 
>> On Wed, Jun 19, 2024, 8:58 AM James Bennett via Elecraft <elecraft at mailman.qth.net <mailto:elecraft at mailman.qth.net>> wrote:
>>> Folks - 
>>> 
>>> I’ve got my KX3 connected via an MFJ 178B-SDR switch to my computer running SDR++. This gives me a nice BIG pan adapter display on my monitor. Additional software syncs the KX3 with SDR++ and RumLogNG - a logging program. Anyway, When I have the KX3 in CW mode, I see a birdie or spur (not sure the actual name for it) about 500 Hz up from my zero-beat frequency. As I turn the KX3 dial, the spur mores right along with me. It is showing with a signal strength of about -79 db. Now I know that is a really low signal, but it does show up on the display and is a tad annoying. Actually, as I type this I’m on 10.116 and as I was testing, I find that there was a low level signal there, under the birdie. The fact it was being covered up bugs me a bit, too.
>>> 
>>> No matter what band I go to, my little “buddy” is there with me. If I switch to USB or LSB, it is gone - it only shows up in CW. And if I do CW-R, it switches to about 500 Hz below my frequency.
>>> 
>>> Anyone else have this? Is it something worth reporting to Elecraft, or is it a known “thing”.
>>> 
>>> 72, Jim / K7TXA
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