[Elecraft] KX3 Spur/Birdie on CW Receive

[James Bennett]

OK - mystery solved! I had posted this on the Elecraft reflector and shortly thereafter realized it should have gone on the KX groups.io <http://groups.io/> list. So, I put it there and THAT is where my answer came from. Now, why it took almost a week to get into the Elecraft reflector is another question. But anyway, my problem was fixed AND now I know why I’m seeing double! Sorry for all the confusion, folks.

BTW - the “birdie” thingy was resolved by the Tech Mode entry RX ISO - turning it ON got rid of the “birdie”. Thanks to JPE1HZG for clueing me in to that one.

> On Jun 19, 2024, at 10:00 AM, James Bennett <w6jhb at me.com> wrote:
> 
> 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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