K3 internal noise?

[N4ZR]

I have been noticing for some time that my N1MM/K3/Airspy HF+ shows some
peculiar artifacts on the N1MM+ spectrum display.  Here's a pic.


Anyone else seeing the same thing?  The "pinstripes" are at 1-KHz
intervals, and the clusters are 22 KHz apart.  The stripes vary somewhat
in strength, and the loudest ones can sometimes be heard very weakly.

My K3 has the new synthesizers.  This isn't an operational problem -
just curious. They are definitely coming from the K3, and I believe they
are being generated inside the radio, because they remain unchanged when
I disconnect the antenna

--

73, Pete N4ZR
Check out the Reverse Beacon Network
at<http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

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[Jim Rhodes-3]

I have some of the stripes, although they are less pronounced with the
KIO3B upgrade installed. And just checking I only see one at about 950 hz
and a weaker one at about double that. At triple that it is very faint. I
don't hear anything though so I have always assumed it was in the received
audio. Before I installed the new i/o boards I had about the same thing you
describe,  again I  never heard anything on the speaker audio so assumed it
was a sound card artifact as it didn't seem to interfere with reception.

Jim Rhodes
K0XU

On Tue, Nov 12, 2019, 20:59 N4ZR <[hidden email]> wrote:

> I have been noticing for some time that my N1MM/K3/Airspy HF+ shows some
> peculiar artifacts on the N1MM+ spectrum display.  Here's a pic.
>
>
> Anyone else seeing the same thing?  The "pinstripes" are at 1-KHz
> intervals, and the clusters are 22 KHz apart.  The stripes vary somewhat
> in strength, and the loudest ones can sometimes be heard very weakly.
>
> My K3 has the new synthesizers.  This isn't an operational problem -
> just curious. They are definitely coming from the K3, and I believe they
> are being generated inside the radio, because they remain unchanged when
> I disconnect the antenna
>
> --
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
> at<http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
>
> ______________________________________________________________
> 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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