[RFI] Constant carrier on 7025

[Don Kirk]

Hi Dave,

I just turned automatic frequency control on my SDR receiver to track the
change and have not observed a movement of more than 3 Hz in over a couple
minutes time but some of that could be on my end as I’m not GPSDO
locked, so I don't trust my own stability.  Once in a while I do hear a
click in my audio when listening to the carrier (listening in AM mode)
which might be one of the observations you are making.

Based on my heading and Steve’s (N2IC) heading I would say the signal
originates down in North or South Carolina for starters but my heading was
taken very quickly and not out in the open as much as I would prefer.  If
it's still on later tonight I will go out to an open field to get more
accurate heading.

Don wd8dsb

On Fri, Nov 10, 2023 at 4:26 PM David Eckhardt <davearea51a at gmail.com>
wrote:

> 120 Hz, I can forgive due to a badly filtered power supply.  However, the
> stepped frequency, always upward, seems to always be there, but it's
> presence is not fixed between time slots.
>
> Dave - WØLEV
>
> On Fri, Nov 10, 2023 at 9:22 PM Don Kirk <wd8dsb at gmail.com> wrote:
>
>> Hi Dave,
>>
>> I just looked at that signal using an SDR receiver set to an RBW of 9.2
>> Hz and I don’t see much but possibly 120 Hz sidebands  but they are at
>> least 50 dB down from the main carrier.
>>
>> Don wd8dsb
>>
>> On Fri, Nov 10, 2023 at 4:12 PM David Eckhardt <davearea51a at gmail.com>
>> wrote:
>>
>>> Does anyone else hear the discrete upward stepping to the additional
>>> constant carrier?
>>>
>>> Dave - WØLEV
>>>
>>> On Fri, Nov 10, 2023 at 9:06 PM Steve London <n2icarrl at gmail.com> wrote:
>>>
>>> > 80 degrees from southwest NM, using 4 element yagi. Not very strong.
>>> >
>>> > 73,
>>> > Steve, N2IC
>>> >
>>> > On Fri, Nov 10, 2023 at 2:03 PM David Eckhardt <davearea51a at gmail.com>
>>> > wrote:
>>> >
>>> >> There is more than one carrier.  One stays put, the other steps
>>> upward,
>>> >> reinitializes, then begins again.  Time: 1358 local, 2058 UT.  There
>>> is a
>>> >> fair amount of weak non-amateur activity on 7.025 MHz.
>>> >>
>>> >> Receiver:  Icom 7300       Antenna:  450-foot long doublet fed with
>>> >>                                                balanced line, home
>>> brew
>>> >> bifilar common
>>> >>                                                mode choke, home bres
>>> >> L-network.
>>> >>
>>> >> I'm in the county with a relatively quiet RF environment.
>>> >>
>>> >> Dave - WØLEV
>>> >>
>>> >> On Fri, Nov 10, 2023 at 8:54 PM bill steffey ny9h <ny9h at comcast.net>
>>> >> wrote:
>>> >>
>>> >> > 10 over on dipole   12 mi South of washington        40 SW  of PGH
>>> >> >
>>> >> > On 11/10/2023 3:08 PM, Don Kirk wrote:
>>> >> > > Just noticed around 3pm EST a strong (S9) constant carrier on
>>> 7.025
>>> >> MHz
>>> >> > > that appears to be skywave.  A very crude quick check with
>>> portable
>>> >> flag
>>> >> > > indicates it’s heading is approximately 130 degrees from my QTH
>>> near
>>> >> > > Indianapolis.
>>> >> > >
>>> >> > > Just FYI in case it continues for any length of time.
>>> >> > >
>>> >> > > 73,
>>> >> > > Don wd8dsb
>>> >> > > _______________________________________________
>>> >> > > RFI mailing list
>>> >> > > RFI at contesting.com
>>> >> > > http://lists.contesting.com/mailman/listinfo/rfi
>>> >> >
>>> >> > --
>>> >> > link to my QRZ listing
>>> >> >
>>> >> >
>>> >> > https://www.qrz.com/db/ny9h
>>> >> >
>>> >> >
>>> >> > --
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>>> >> > www.avg.com
>>> >> >
>>> >> > _______________________________________________
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>>> >> > RFI at contesting.com
>>> >> > http://lists.contesting.com/mailman/listinfo/rfi
>>> >> >
>>> >>
>>> >>
>>> >> --
>>> >>
>>> >> *Dave - WØLEV*
>>> >> _______________________________________________
>>> >> RFI mailing list
>>> >> RFI at contesting.com
>>> >> http://lists.contesting.com/mailman/listinfo/rfi
>>> >>
>>> >
>>>
>>> --
>>>
>>> *Dave - WØLEV*
>>> _______________________________________________
>>> RFI mailing list
>>> RFI at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rfi
>>>
>>
>
> --
>
> *Dave - WØLEV*
>
>
>