[RFI] Constant carrier on 7025

[Frank Donovan]

Thanks to all of the reports on rfi at contesting.com,
the carrier on 7025 is reported to be off the air

73
Frank
W3LPL

----- Original Message -----
From: "David Eckhardt" <davearea51a at gmail.com>
To: "Don Kirk" <wd8dsb at gmail.com>
Cc: "RFI" <rfi at contesting.com>
Sent: Friday, November 10, 2023 1:32:25 PM
Subject: Re: [RFI] Constant carrier on 7025

The stepped carrier does not fade due to ionospheric modulation at the same
rate or period as the constant carrier.  Are the two sourced from similar
locations?  This implies not.

Dave - WØLEV

On Fri, Nov 10, 2023 at 9:25 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
>>> >> >
>>> >> >
>>> >> > --
>>> >> > This email has been checked for viruses by AVG antivirus software.
>>> >> > www.avg.com
>>> >> >
>>> >> > _______________________________________________
>>> >> > 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*
>>> _______________________________________________
>>> RFI mailing list
>>> RFI at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rfi
>>>
>>
>
> --
>
> *Dave - WØLEV*
>
>
>

-- 

*Dave - WØLEV*
_______________________________________________
RFI mailing list
RFI at contesting.com
http://lists.contesting.com/mailman/listinfo/rfi