KX3 - broadcast band interference ??

[yo8sep]

A few days ago I've noticed something strange at my KX3.
If was around dusk and I was on 20m band, USB trying to listen for a very low signal station and got something that looks like an AM brodcasting , but not in a language that I can understand.
The strange thing was that was heard even when tuning to different frequencies.
PRE was on, antenna was yagi 3 elements on 20m, at 12m height.

I've made a short video, sorry for the poor quality. https://www.youtube.com/watch?v=CX7fr6Iwg-Q
 
If I changed the RX SHIFT settings to 8KHz, I still could see that signal on panadapter (NAP3) but audio was shifted to 8kHz.

What could cause that problem/interference ?

73,
Petronel
YO8SEP

[w0mu]

Are you close to any AM broadcast stations?


On 12/21/2016 4:05 AM, yo8sep wrote:

> A few days ago I've noticed something strange at my KX3.
> If was around dusk and I was on 20m band, USB trying to listen for a very
> low signal station and got something that looks like an AM brodcasting , but
> not in a language that I can understand.
> The strange thing was that was heard even when tuning to different
> frequencies.
> PRE was on, antenna was yagi 3 elements on 20m, at 12m height.
>
> I've made a short video, sorry for the poor quality.
> https://www.youtube.com/watch?v=CX7fr6Iwg-Q
> <https://www.youtube.com/watch?v=CX7fr6Iwg-Q>
>  
> If I changed the RX SHIFT settings to 8KHz, I still could see that signal on
> panadapter (NAP3) but audio was shifted to 8kHz.
>
> What could cause that problem/interference ?
>
> 73,
> Petronel
> YO8SEP
>
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/KX3-broadcast-band-interference-tp7624847.html
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[yo8sep]

There is an AM broadcast station at 40miles from me,  but the signal I got was on a foreign language,  maybe somewhere Middle East... 

And it was all over the band,  even on upper bands,  15/10. Turning off Pre or turning on RX SHIFT 8KHZ, seems to solve/hide the problem.  But that is not really a solution,  especially when using NAP3 and CW skimmer. 

73

Petronel 

On 21 Dec 2016 17:50, "w0mu [via Elecraft]" <[hidden email]> wrote:

Are you close to any AM broadcast stations?


On 12/21/2016 4:05 AM, yo8sep wrote:

> A few days ago I've noticed something strange at my KX3.
> If was around dusk and I was on 20m band, USB trying to listen for a very
> low signal station and got something that looks like an AM brodcasting , but
> not in a language that I can understand.
> The strange thing was that was heard even when tuning to different
> frequencies.
> PRE was on, antenna was yagi 3 elements on 20m, at 12m height.
>
> I've made a short video, sorry for the poor quality.
> https://www.youtube.com/watch?v=CX7fr6Iwg-Q
> <https://www.youtube.com/watch?v=CX7fr6Iwg-Q>
>  
> If I changed the RX SHIFT settings to 8KHz, I still could see that signal on
> panadapter (NAP3) but audio was shifted to 8kHz.
>
> What could cause that problem/interference ?
>
> 73,
> Petronel
> YO8SEP
>
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/KX3-broadcast-band-interference-tp7624847.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:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

______________________________________________________________
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Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

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