[600MRG] Unidentified intermittent signal observed near 475.970 kHz

[John Langridge]

Thanks Scott.

I've just seen 3 consecutive cycles of the signal since your email
arrived but its very weak, weaker than I have seen it all day:

http://njdtechnologies.net/wp-content/uploads/2019/09/mystery-090319.png

Please excuse the crudeness of the image.  Ive air brushed out KE7A
and K5DNL WSPR, both of which are probably 20 dB stronger than the
signal in question.

In the image, the signal resides within the bounds of the painted
lines... at the bottom is the wide band component and just South of
1800 you can see the persistent signal which, at the moment, looks
more like CW than it has since I've been observing the signal.  Its
completely inaudible at the moment.

Appreciate you looking.  Perhaps more details will become available.
If the signal is originating from a ham, perhaps they will see this
discussion and speak up.

73!

John



On 9/3/19, Scott Armstrong <aa5am at vntx.net> wrote:
> Well no mystery signal heard/seen in N.E.Collin County thus far.
>
> My 160m Inv-L which I usually use for RX is laying in the yard at the
> moment so I've been using the 30m 1/4wl vertical. It doesn't work as good
> but doesn't seem to have any problems hearing K5DNL or KE7A whopper WSPR
> signals.
>
>
> I'll watch for it over the next several days. Hopefully I can get the Inv-L
> back in the air this weekend.
>
> 73,
> Scott AA5AM
>
>
> On Tue, Sep 3, 2019 at 12:28 PM John Langridge <kb5njd at gmail.com> wrote:
>
>> Someone asked if the signal was seen during the day or night.  I
>> totally forgot to mention in my original post.
>>
>> I've only ever seen the signal during the day and I believe that KE7A
>> has had similar experiences.  Its been very noisy over the last week
>> since this began and a good examination of the signal after dark has
>> not been attempted here.
>>
>> There is a very real possibility that the signal is local, originating
>> in East Dallas or the county immediately to the East of me and may be
>> transmitting with very low power to a very compromised antenna so its
>> foot print may be quite small.
>>
>> thanks again - 73!
>>
>> jl
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>