Thanks to all of the reports on [email protected],
the carrier on 7025 is reported to be off the air
73
Frank
W3LPL
----- Original Message -----
From: "David Eckhardt" <[email protected]>
To: "Don Kirk" <[email protected]>
Cc: "RFI" <[email protected]>
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 <[email protected]>
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 <[email protected]> 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 <[email protected]>
>> 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 <[email protected]> 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 <[email protected]>
>>> > 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 <[email protected]>
>>> >> 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
>>> >> > > [email protected]
>>> >> > > 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
>>> >> > [email protected]
>>> >> > http://lists.contesting.com/mailman/listinfo/rfi
>>> >> >
>>> >>
>>> >>
>>> >> --
>>> >>
>>> >> *Dave - WØLEV*
>>> >> _______________________________________________
>>> >> RFI mailing list
>>> >> [email protected]
>>> >> http://lists.contesting.com/mailman/listinfo/rfi
>>> >>
>>> >
>>>
>>> --
>>>
>>> *Dave - WØLEV*
>>> _______________________________________________
>>> RFI mailing list
>>> [email protected]
>>> http://lists.contesting.com/mailman/listinfo/rfi
>>>
>>
>
> --
>
> *Dave - WØLEV*
>
>
>
--
*Dave - WØLEV*
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